World War I

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World War I was primarily a European conflict with many facets: immense human sacrifice, stalemate trench warfare, and the use of new, devastating weapons - tanks, aircraft, machineguns, and poison gas.

World War I, also known as the First World War, the Great War, the War of the Nations and the War to End All Wars, was a world conflict occurring from 1914 to 1918. The war was fought by the Allies on one side and the Central Powers on the other. No previous conflict had mobilized so many soldiers or involved so many in the field of battle. By its end, the war had become the second bloodiest conflict in recorded history (behind the Taiping Rebellion), though it was surpassed within a generation by World War II.

No other war had changed the map of Europe so dramatically - four empires were shattered: The German, the Austro-Hungarian, the Ottoman and the Russian. Their four dynasties, the Hohenzollerns, the Habsburgs, the Ottomans, and the Romanovs, who had roots of power back to the days of the Crusades, all fell during or after the war.

World War I became infamous for trench warfare, where troops were confined to trenches because of tight defenses. This was especially true of the Western Front. Over 9 million died on the battlefield, and nearly that many more on the home front due to food shortages, genocide, and ground combat. Among other notable events, chemical weapons were used for the first time, the first large scale bombing from the air was undertaken, and some of the century's first large-scale civilian massacres took place.

The causes of World War I were complex developments by themselves (see causes below).

World War I proved to be the decisive break with the old world order, marking the final demise of absolutist monarchy in Europe. The post-war failure to deal effectively with many of the causes and results of the War would lead to the rise of Fascism in Italy, National Socialism in Germany and the outbreak of World War II within a generation. The War was also the catalyst for the Russian Revolution, which would inspire later revolutions in countries as diverse as China and Cuba, and would lay the basis for the Cold War standoff between the Soviet Union and the United States. The War ended the Ottoman Empire in the east and laid the basis for a modern democratic successor state, Turkey. In Central Europe, new states Czechoslovakia and Yugoslavia were born and Poland was re-created.

Activity by the French and British Empire forces in the eastern part of the former Ottoman Empire would give rise to several modern conflicts, including the Israeli-Palestinian conflict, the Greco-Turkish conflict over Cyprus, the Iran-Iraq conflict of the 1980s, and the attempted land grab of the 1990s by Iraq. The Graeco-Turkish conflict, which ended in 1924, was the last direct major conflict of the war.

Causes

Gavrilo Princip - the igniting torch of World War I

See also: Causes of World War I and Participants in World War I

On June 28, 1914, Franz Ferdinand, Archduke of Austria and heir to the Austro-Hungarian throne, was assassinated in Sarajevo by Gavrilo Princip, a Bosnian Serb student. He was part of a group of eight assassins, acting with support from parts of the Serbian government. The assassination sparked little initial concern in Europe. The Archduke himself was not terribly popular, least of all in the Austro-Hungarian Empire. While there were riots in Sarajevo following the Archduke's death these were largely aimed at the Serbian minority. Though this assassination has been linked as the direct trigger for World War I, the war's real origins lie further back, in the complex web of alliances and counterbalances that developed between the various European powers after the defeat of France and formation of the German state under the leadership of Otto von Bismarck in 1871.

Reasons & Responsibilities

The reasons for the outbreak of World War I is a rather complicated issue; there are many factors which intertwine. Some examples are:

• Unresolved previous disputes
• The intricate system of alliances
• Convoluted and un-unified governance
• The delays and misunderstandings in diplomatic communications
• The arms races
• The rigid military planning
• See also: Causes of World War I

There are many different hypotheses that try to explain who, or what, is to blame for the outbreak of the First World War. Early explanations, prominent in the 1920s and 1930s, stressed the official version of responsibility as enumerated in the Treaty of Versailles and Treaty of Trianon, that Germany and its allies were solely responsible for the war. However as time progressed scholars began looking toward the rigidity of French, British, German, Austrian and Russian military planning system. This system stressed the importance of striking first and executing plans quickly. The military doctrine of all of these nations was emphatic that victory would only be gained by striking first, and that mobilization, once begun, could not be halted or slowed without risking invasion and defeat. Another cause for war could be seen through the building of alliances and arms races. Nations in the Triple Entente became fearful of the Triple Alliance and vice-versa. Germany would lead by advancing military technology, and Britain, as a sea faring nation, would follow suit with stronger ships. The civilian leaders of the European powers also found themselves facing a wave of nationalist euphoria that had been building across Europe for years. This left governments with ever fewer options and little room to manoeuvre as the last weeks of July 1914 slipped away. Frantic diplomatic efforts to mediate the Austrian-Serbian quarrel simply became irrelevant, as the automatic military escalations between Germany and Russia reinforced one another.

Furthermore, the problem of communications in 1914 should not be underestimated; all nations still used telegraphy and ambassadors as the main form of communication, resulting in delays from hours to even days. There is probably no single concise or conclusive assessment of the exact cause of the First World War.

Outbreak of war

This map of Europe shows the layout of the two alliances: Central Powers are shown in orange and Entente Powers are shown in green.

Austria-Hungary was created in the "Ausgleich of 1867" after Austria was defeated by Prussia. As agreed to in 1867 the Habsburgs would be Emperors of Austria and Kings of Hungary. Hungary would gain a parliament and have certain rights similar to home rule. This compromise was agreed to by Franz Josef and others in the German aristocracy in hopes of preserving their power. It did not solve the more fundamental problems of the Austro-Hungarian Empire. With the formation of the Dual Monarchy Franz Josef became leader of a nation with sixteen ethnic groups and five major religions speaking no fewer than nine languages.

In large measure because of the vast disparities that existed within the Empire, Austrians and Hungarians always viewed growing Slavic nationalism with deep suspicion and concern. Thus the Austro-Hungarian government grew concerned with the near-doubling in size of neighbouring Serbia's territory as a result of the Balkan Wars of 1912-1913. Serbia, for its part, made no qualms about the fact that it viewed all of Southern Austria-Hungary as part of a future Great South Slavic Union. This view had also garnered considerable support in Russia. Many in the Austrian leadership, not least Habsburg Emperor Franz Joseph, and Conrad von Hötzendorf, worried that Serbian nationalist agitation in the southern provinces of the Empire would lead to further unrest among the Austro-Hungarian Empire's other disparate ethnic groups. The Austro-Hungarian government worried that a nationalist Russia would back Serbia to annex Slavic areas of Austria-Hungary. The feeling was that it was better to destroy Serbia before they were given the opportunity to launch a campaign.

After the assassination of Franz Ferdinand, after nearly a month of debate, the government of Austria-Hungary sent a 10-point ultimatum to Serbia (July 23, 1914) - the so called July Ultimatum - to be unconditionally accepted within 48 hours. The ultimatum was the first of a series of diplomatic events known as the July Crisis.

The Serbian government agreed to all but one of the demands in the ultimatum, noting that participation in its judicial proceedings by a foreign power would violate its constitution. Austria-Hungary nonetheless broke off diplomatic relations (July 25) and declared war (July 28) through a telegram sent to the Serbian government.

The Russian government, which had pledged in 1909 to uphold Serbian independence in return for Serbia's acceptance of the Bosnia annexation, mobilised its military reserves on July 30 following a breakdown in crucial telegram communications between Kaiser Wilhelm and Tsar Nicholas II (the famous "Willy and Nicky" correspondence), who was under pressure by his military staff to prepare for war. Germany demanded (July 31) that Russia stand down its forces, but the Russian government persisted, as demobilization would have made it impossible to re-activate its military schedule in the short term. Germany declared war against Russia on August 1 and, two days later, against the latter's ally France.

The outbreak of the conflict is often attributed to the alliances established over the previous decades "” Germany-Austria-Italy vs. France-Russia; Britain and Serbia being aligned with the latter. In fact, none of the alliances were activated in the initial outbreak, though Russian general mobilization and Germany's declaration of war against France were motivated by fear of the opposing alliance being brought into play.

Britain declared war against Germany on August 4. This was not officially the result of understandings with France and Russia (Britain was technically allied to neither power), but of Germany's invasion of Belgium on August 4, 1914, whose independence Britain had guaranteed to uphold in the Treaty of London of 1839, and which stood astride the planned German route for invasion of Russia's ally France. Unofficially, it was already generally accepted in government that Britain could not remain neutral, since without the co-operation of France and Russia its colonies in Africa and India would be under threat, while German occupation of the French Atlantic ports would be an even larger threat to British trade as a whole.

The spread of war

1914

• July 23: Austria-Hungary ultimatum to Serbia.
• July 28: Austria-Hungary declares war on Serbia.
• July 31: Russia begins mobilization.
• August 1: Germany declares war on Russia.
• August 2: German troops occupy Luxembourg
• August 3: Germany declares war on France
• August 4: Germany invades neutral Belgium; the United Kingdom declares war on Germany in response.
• August 6: Montenegro sides with its tradional ally, Serbia, and declares war on Austria-Hungary
• August 10: Austria-Hungary declares war on Russia.
• August 12: The United Kingdom and France declare war on Austria-Hungary.
• August 23: Japan declares war on Germany
• September: Unity Pact signed by France, Britain, and Russia
• October 9: Belgium falls to German troops at the Siege of Antwerp
• October 29: The Ottoman Empire enters the war on the side of Germany and Austria-Hungary.
• November 2: Russia declares war on the Ottoman sultanate.
• November 5: France and United Kingdom declare war on the Ottoman sultanate.
• December 25: Christmas Truce in the Trenches.

1915

• April 24: Young Turk Ottoman government begins deportation and murder of Armenians and Assyrians accusing them of collaboration with the Allies
• April 25: Gallipoli campaign commences
• April 26: Italy secretly signs the London Pact with the Triple Entente
• May 23: Italy declares war on Austria-Hungary
• October 14: Bulgaria declares war on Serbia and enters the war on the side of Germany and Austria-Hungary.

1916

• March 9: Germany declares war on Portugal (see Portugal in the Great War)
• August 27: Romania declares war on Austria-Hungary
• August 28: Italy declares war on Germany

1917

• January 16: Germany sends the Zimmermann Telegram to Mexico, proposing an alliance against the United States.
• April 6: The United States declares war on Germany.
• June 27: Greece enters the war on the side of the Entente.
• August 14: The Republic of China declares war on Germany.
• October 26: Brazil declares war on Germany.
• November 7: The October Revolution takes place in Russia.
• December 7: United States declares war on Austria-Hungary.

1918

• 3 March: Treaty of Brest-Litovsk between Russia and the Central Powers, marking Russia's exit from World War I.
• October 30 : Mudros/Turkish Armistice signed opening Turkish territory to Entente military operations.
• November 11: Armistice signed, end of World War I.

1919

• 28 June: Treaty of Versailles, official end to World War I between the Entente and Central Powers.

1920

• 4 June: Treaty of Trianon, partition of Austro-Hungarian Empire's Kingdom of Hungary.

Opening battles

Haut-Rhin, France 1917. A complete set of these images can be found at World War One Color Photos

Some of the very first actions of the war occurred far from Europe, in Africa and in the Pacific Ocean. On August 8 1914 a combined French and British Empire force invaded the German protectorate of Togoland. On August 10 German forces based in South-West Africa attacked South Africa. New Zealand occupied German Samoa (30 August 1914) and on September 11 the Australian Naval and Military Expeditionary Force landed on the island of Neu-Pommern, which formed part of German New Guinea. Within a few months the Entente forces had accepted the surrender of or driven out German forces in the Pacific. But sporadic and fierce fighting continued in Africa for the remainder of the war.

In Europe, Germany and Austria-Hungary suffered from miscommunication regarding each army's intentions. Germany had originally guaranteed to support Austria-Hungary's invasion of Serbia, but the interpretations of this idea differed. Austro-Hungarian leaders thought that Germany would cover their northern flank against Russia, but Germany had planned for Austria-Hungary to focus the majority of its troops on Russia while Germany dealt with France on the Western Front. This confusion forced the Austro-Hungarian army to split its troop concentrations from the south in order to meet the Russians in the north. The Serb army, coming up from the south of the country, met the Austrian army at the Battle of Cer on August 12, 1914.

The Serbians occupied defensive positions against the Austrians. The first attack came on August 16th, between parts of the 21st Austro-Hungarian division and parts of the Serbian Combined division. In harsh night-time fighting the battle ebbed and flowed, until Stepa Stepanovic rallied the Serbian line. Three days later the Austrians retreated across the Danube, having suffered 21,000 casualties as against 16,000 Serbian casualties. This marked the first major Allied victory of the war. The Austrians had not achieved their main goal of eliminating Serbia, and it became increasingly likely that Germany would have to maintain forces on two fronts.

Germany's plan (named the Schlieffen plan) to deal with the Franco-Russian alliance involved delivering a knock-out blow to the French and then turning to deal with the more slowly mobilized Russian army. Rather than invading eastern France directly, German planners deemed it prudent to attack France from the north. To do so, the German army had to march through Belgium. Germany demanded free passage from the Belgian government, promising to treat Belgium as Germany's firm ally if the Belgians agreed. When Belgium refused, Germany invaded and began marching through Belgium anyway, after first invading and securing Luxembourg. It soon encountered resistance before the forts of the Belgian city of Liège, although the army as a whole continued to make rapid progress into France. Britain sent an army to France (the British Expeditionary Force, or BEF), which advanced into Belgium. Initially the Germans had great successes in the Battle of the Frontiers (14 - 24 August 1914).

However, the delays brought about by the resistance of the Belgian, French and British forces and the unexpectedly rapid mobilization of the Russians upset the German plans. Russia attacked in East Prussia, diverting German forces intended for the Western Front. Germany defeated Russia in a series of battles collectively known as the (second) Battle of Tannenberg (17 August - 2 September), but this diversion allowed French and British forces to finally halt the German advance on Paris at the First Battle of the Marne (September 1914) as the Entente forced the Central Powers into fighting a war on two fronts. However, the German army had fought its way into a good defensive position inside France and had permanently incapacitated 230,000 more French and British troops than it had lost itself in the months of August and September.

Early stages: from romanticism to the trenches

In the trenches: Infantry with gasmasks, Ypres, 1917

The perception of war in 1914 was romanticized by many people, and its declaration was met with great enthusiasm by these people. The common view was that it would be a short war of manoeuvre with a few sharp actions (to "teach the enemy a lesson") and would end with a victorious entry into the capital (the enemy capital, naturally) then home for a victory parade or two and back to "normal" life. However, many people regarded the coming war with great pessimism and worry. Many military commanders on both sides, like Lord Kitchener, predicted the war would be a long one. Other political leaders, such as Bethmann Hollweg in Germany, were concerned by the potential social consequences of a war. International bond and financial markets entered severe crises in late July and early August reflecting worry about the financial consequences of war.

The perceived excitement of war captured the imagination of many in the warring nations. Spurred on by propaganda and nationalist fervour, many eagerly joined the ranks in search of adventure. Few were prepared for what they actually encountered at the front.

See also: Recruitment to the British Army during WW I

Trench warfare begins

See main article: Western Front (World War I)

After their initial success on the Marne, Entente and German forces began a series of outflanking manoeuvres to try to force the other to retreat, in the so-called Race to the Sea. Britain and France soon found themselves facing entrenched German positions from Lorraine to Belgium's Flemish coast. The sides took set positions, the British and French seeking to take the offensive while Germany sought to defend the territories they had occupied. One consequence of this was that the German trenches were much better constructed than those of their enemy: the Anglo-French trenches were only intended to be 'temporary' before their forces broke through the German defences. Neither side proved able to deliver a decisive blow for the next four years, though protracted German action at Verdun throughout (1916), and the Entente's failure at the Somme in the summer of 1916 brought the French army to the brink of collapse. Futile attempts at more frontal assaults, at terrible cost to the French poilu infantry, led to mutinies which threatened the integrity of the front line in 1917 after the Nivelle Offensive in the spring of 1917. Throughout 1915-17 the British Empire and French armies suffered many more casualties than the German one, but both sides lost millions of soldiers to injury and death.

Around 800,000 soldiers from the British Empire were on the Western Front at any one time, 1,000 battalions each occupying a sector of the line from Belgium to the Arne and operating a month-long four stage system, unless an offensive was underway. The front contained over 6,000 miles of trenches. Each battalion held its sector for around a week before moving back to support lines and then the reserve lines before a week out-of-line, often in the Poperinge or Amiens areas.

Southern theatres

Entry of the Ottoman Empire

The Ottoman Empire joined the Central Powers in October"“November 1914, due to the secret Turco-German Alliance signed on August 2, 1914, threatening Russia's Caucasian territories and Britain's communications with India and the East via the Suez canal. British Empire action opened another front in the South with the Gallipoli (1915) and Mesopotamia campaigns, though initially the Turks were successful in repelling enemy incursion. But in Mesopotamia, after the disastrous Siege of Kut (1915"“16), British Empire forces reorganized and captured Baghdad in March 1917. Further to the west in Palestine, initial British failures were overcome with Jerusalem being captured in December 1917 and the Egyptian Expeditionary Force under Edmund Allenby going on to break the Ottoman forces at the Battle of Megiddo (September 1918).

Russian armies generally had the best of it in the Caucasus. Enver Pasha, supreme commander of the Turkish armed forces, was a very ambitious man, with a dream to conquer central Asia. He was not a practical soldier. He launched an offensive with 100,000 troops against the Russians in the Caucasus in December of 1914. Insisting on a frontal attack against Russian positions in the mountains in the heart of winter, Enver lost 86% of his force. A new Russian commander on the front in the fall of 1915, Grand Duke Nicholas, brought new vigour. A major offensive in 1916 drove the Turks out of much of present-day Armenia, and tragically provided a context for the deportation and massacre of the Armenian population in eastern Anatolia. With control of part of the southern Black Sea coast, Nicholas pushed forward the construction of railway lines to bring up supplies. He was ready for an offensive in the spring of 1917. If it had gone ahead, there was a very good chance that Turkey would have been knocked out of the war in the summer of 1917. But, because of the Russian Revolution, Grand Duke Nicholas was recalled and the Russian armies soon fell apart.

Italian participation

See main article: Italian Campaign (WWI)

Italy had been nominally allied to the German and Austro-Hungarian Empires since 1882, but had its own designs against Austrian territory in the South Tyrol, Istria and Dalmatia, and a secret 1902 understanding with France effectively nullifying its alliance commitments. Italy refused to join Germany and Austria-Hungary at the beginning of the war and joined the Entente by signing the London Pact in April and declaring war on Austria-Hungary in May 1915; it declared war against Germany fifteen months later.

In general, the Italians enjoyed numerical superiority, but were poorly equipped; instead, the Austro-Hungarian defence took advantage of the mostly mountainous terrain, which was anything but suitable for military offensives. For the most part the Front in Ice and Snow remained unchanged during the war, while Austrian Kaiserschützen and Standschützen and Italian Alpini fought bitter close combat battles during summer and tried to survive during winter in the high mountains. So beginning from 1915 the Italians mounted 17 major offensives on the Isonzo front (the part of the border which was closest to Trieste), but all were repelled by the Austro-Hungarians, who had the higher ground. The Austro-Hungarians counter-attacked from the Altopiano of Asiago towards Verona and Padua in the spring of 1916 (Strafexpedition), but they also made little progress. In the summer, the Italians took back the initiative, capturing the town of Gorizia. After this minor victory, the front remained practically stable for over one year, despite several Italian offensives, again all on the Isonzo front. In the fall of 1917, thanks to the improving situation on the Eastern front, the Austrians received large reinforcements, including German assault troops. On October 26, they launched a crushing offensive that resulted in the victory of Kobarid (Caporetto): the Italian army was routed, but after retreating more than 100 km, it was able to reorganize and hold ground at the Battle of the Piave River. In 1918 the Austrians repeatedly failed to break this Italian line, and surrendered to the Entente powers in November.

Throughout the war Austro-Hungarian Chief of Staff, Conrad von Hötzendorf had a deep hatred for the Italians because he had always perceived them to be the greatest threat to his state. Their betrayal in 1914 enraged him even further. His hatred for Italy blinded him in many ways, and he made many foolish tactical and strategic errors during the campaigns in Italy.

Fall of Serbia

After repelling three Austrian invasions in August-December 1914, Serbia fell to combined German, Austrian and Bulgarian invasion in October 1915. Serbian troops continued to hold out in Albania and Greece, where a Franco-British force had landed to offer assistance and to pressure the Greek government into war against the Central Powers.

The Eastern Front

Austro-Hungarian prisoners of war, Russia, 1915

Main article: Eastern Front (World War I)

While the Western Front had reached stalemate in the trenches, the war continued in the east. The Russian initial plans for war had called for simultaneous invasions of Austrian Galicia and German East Prussia. Although Russia's initial advance into Galicia was largely successful, they were driven back from East Prussia by the victories of the German generals Hindenburg and Ludendorff at Tannenberg and the Masurian Lakes in August and September 1914. Russia's less-developed economic and military organization soon proved unequal to the combined might of the German and Austro-Hungarian Empires. In the spring of 1915 the Russians were driven back in Galicia, and in May the Central Powers achieved a remarkable breakthrough on Poland's southern fringes, capturing Warsaw on August 5 and forcing the Russians to withdraw from all of Poland, known as the "Great Retreat".

The Russian Revolution

Dissatisfaction with the Russian government's conduct of the war grew despite the success of the June 1916 Brusilov offensive in eastern Galicia against the Austrians, when Russian success was undermined by the reluctance of other generals to commit their forces in support of the victorious sector commander. Allied fortunes revived only temporarily with Romania's entry into the war on August 27: German forces came to the aid of embattled Austrian units in Transylvania, and Bucharest fell to the Central Powers on December 6. Meanwhile, internal unrest grew in Russia, as the Tsar remained out of touch at the front, while Empress Alexandra's increasingly incompetent rule drew protests from all segments of Russian political life, resulting in the murder of Alexandra's favourite Rasputin by conservative noblemen at the end of 1916.

In March 1917, demonstrations in St. Petersburg culminated in the abdication of Tsar Nicholas II and the appointment of a weak centrist Provisional Government, which shared power with the socialists of the Petrograd Soviet. This division of power led to confusion and chaos, both on the front and at home, and the army became progressively less able to effectively resist Germany. Meanwhile, the war, and the government, became more and more unpopular, and the discontent was used strategically by the Bolshevik party, led by Vladimir Lenin, in order to gain power.

The triumph of the Bolsheviks in November was followed in December by an armistice and negotiations with Germany. At first, the Bolsheviks refused to agree to the harsh German terms, but when Germany resumed the war and marched with impunity across Ukraine, the new government acceded to the Treaty of Brest-Litovsk on March 3, 1918, which took Russia out of the war and ceded vast territories including Finland, the Baltic provinces, Poland and Ukraine to the Central Powers.

After the Russians initially dropped out of the war, Entente led a small-scale invasion of Russia. The invasion was made with intent to punish the Russians for dropping out of World War I and to support the Tsarists in the Russian Revolution. Troops landed in Archangel and in another city on the Pacific coast of Russia. The Entente forces were initially told they were invading to defend supplies from German troops. In reality, they were defending them from communist Russians. A memorial commemorating the event is located in White Chapel Cemetery in Troy, Michigan. The force also included a number of Canadians who were based in Vladivostok. The Canadian force contained an artillery unit, but they saw minimal combat.

The Last Half

Events of 1917 would prove decisive in ending the war, although their effects would not fully be felt until 1918. The Entente's naval blockade of Germany began to have serious impact on morale and productivity on the German home-front. In response, in February 1917, the German General Staff (OHL) were able to convince Chancellor Theobald von Bethmann-Hollweg to declare unrestricted submarine warfare, with the goal of starving Britain out of the war. Tonnage sunk rose above 500,000 tonnes per month from February until July, peaking at 860,000 tonnes in April. After July, the newly introduced convoy system was extremely effective in neutralizing the U-boat threat. Britain was safe from the threat of starvation.

Indicator Nets were predominantly deployed by the British Royal Navy as a means"”albeit generally unsuccessful"”of discouraging enemy (usually German) submarines from entering Entente waters. Constructed using light steel nets these were anchored at various depths to the sea bed around key Entente naval bases and were intended to entangle enemy U-boat traffic, although even then submarines were often able to disentangle themselves and escape before they were blown up by depth charges. They were seldom used as the sole anti-submarine measure but were instead mixed with other defences, which usually included extensive minefields and patrolling warships. In time mines were actually attached to the nets, thereby reducing the survival chances of an entangled submarine.

Once a submarine became entangled a marker buoy attached to the net would drift along the surface indicating enemy activity below. The first example of indicator nets assisting in the destruction of a German U-boat occurred at Dover when the U-8 became entangled on 4 March 1915.

Indicator Nets were used extensively"”dropped from light fishing craft"”at both Dover and Otranto Barrages. Individual nets were sometimes as much as 100 metres in length. While these were ultimately of some benefit at Dover (where the barrage was constantly fine-tuned to produce results) they proved ineffective at Otranto, with gaps between the light steel nets sufficiently wide to allow enemy submarines through. Under cover of darkness, U-boats could also thwart the nets by coasting along the surface, as happened at the Otranto Barrage.

The decisive victory of Germany at the Battle of Caporetto led to the Entente decision at the Rapallo Conference to form the Supreme Allied Council at Versailles to co-ordinate plans and action. Previously British Empire and French armies had operated under separate command systems.

In December, the Central Powers signed an Armistice with Russia, thereby releasing troops from the eastern front for use in the west. Ironically, German troop transfers could have been greater if their territorial acquisitions had not been so dramatic. With both German reinforcements and new American troops pouring into the Western Front, the final outcome of the war was to be decided in that front. The Central Powers knew that they could not win a protracted war now that American forces were certain to be arriving in increasing numbers, but held high hopes for a rapid offensive in the West, using their reinforced troops and new infantry tactics. Furthermore, rulers of both the Central Powers and the Entente became more fearful of the threat first raised by Ivan Bloch in 1899, that protracted industrialized war threatened social collapse and revolution throughout Europe. Both sides urgently sought a decisive, rapid victory on the Western Front as they were both fearful of collapse or ever continuing stalemate.

Entry of the United States

President Wilson before Congress, announcing the break in the official relations with Germany. February 3, 1917.

A long stretch of American isolationism left the United States reluctant to involve itself with what was popularly conceived as a European dispute.

Early in 1917 Germany resumed its policy of unrestricted submarine warfare. This, combined with public indignation over the Zimmermann telegram, led to a final break of relations with the Central Powers. President Woodrow Wilson requested that the U.S. Congress declare war on Germany, which it did on April 6, 1917 (see: Woodrow Wilson declares war on Germany on Wikisource). The Senate approved the war resolution 82-6, the House with 373-50. Wilson hoped a separate peace could be achieved with Austria-Hungary, however when it kept its loyalty to Germany, the US declared war on Austria-Hungary in December 1917.

Although the American contribution to the war was important, particularly in terms of the threat posed by increased US presence in Europe, the United States was never formally a member of the Entente, but an "Associated Power". Significant numbers of American troops only arrived in Europe in the summer of 1918.

The United States Army and the National Guard had mobilized in 1916 to pursue the Mexican "bandit" Pancho Villa, which helped speed up the mobilization. The United States Navy was able to send a battleship group to Scapa Flow to join with the British Grand Fleet, a number of destroyers to Queenstown, Ireland and several divisions of submarines to the Azores and Bantry Bay, Ireland to help guard convoys . However, it would be some time before the United States forces would be able to contribute significant manpower to the Western and Italian fronts.

The British and French insisted that the United States emphasize sending infantry to reinforce the line. Throughout the war, the American forces were short of their own artillery, aviation, and engineering units. However, General John J. Pershing, American Expeditionary Force commander, resisted breaking up American units and using them as reinforcements for British Empire and French units, as suggested by the Allies. Pershing also maintained the use of frontal assaults, which had been discarded by that time by British Empire and French commanders. As a result the American Expeditionary Force suffered a very high rate of casualties in its operations in the summer and fall of 1918.

German Spring Offensive of 1918

Ludendorff made plans for a 1918 general offensive along the Western Front. The Spring Offensive sought to divide the British Empire and French armies in a series of feints and advances. To the German leadership, a deteriorating economic and manpower situation compared to the Allies' strengthening through the United States' entry made 1918 the last chance for victory.

In 1917, Germany decided that it had a year or so left to win the war before necessary industries could no longer support the effort and unrestricted submarine warfare, designed to starve Britain out of the war, would lead to United States' intervention. Time was not on Germany's side, as it had to find a way to win the war before the United States and its industrial potential and manpower made a difference in the west. Germany took this gamble, and though the outcome was not as planned due the failure to win at sea, it still had a chance to win the war a year later in 1918. Russia was out of the war, and Germany could now concentrate on the West and win quickly by "conquering peace", according to Ludendorff's plan.

Before the offensives even began, Ludendorff may have made the mistake of leaving the elite eighth army in Russia and sending over only a small portion of the forces from the east to aid the offensive in the west. Likewise, the Russian army had collapsed in the midst internal revolution, but rather than end the conflict in the east by pushing on towards St. Peterburg, Ludendorff weighted out the situation, a decision that spared Germany further casualties but lost Germany valuable time. By the time its offensives in the west would begin, the United States would have mobilized and sent over enough men to make a difference. Likewise, the economic situation may have been resolved if the capabilities of the grain producing and other industrial regions in the east had been conquered and organized long before the signing of Brest-Litovsk. As it was, the newly gained territory did little to contribute to the war effort, aside from providing a morale boost.

Nevertheless, Operation Michael opened on 21 March 1918 with an attack against British Empire forces, towards the rail junction at Amiens. It was Ludendorff's intention to split the British Empire and French armies at this point. German forces achieved an unprecedented advance of 60km. For the first time since 1914, manoeuvre had returned to the battlefield.

British Empire and French trenches were defeated using novel infiltration tactics. To this time, attacks had been characterized by long artillery bombardments and continuous-front mass assaults. However, in the Spring Offensive the German Army used artillery briefly and infiltrated small groups of infantry at weak points, attacking command and logistics areas and surrounding points of serious resistance. These isolated positions were then destroyed by more heavily armed infantry. German success relied greatly on this tactic.

The frontline had now moved to within 120 kilometres of Paris. Three super-heavy Krupp railway guns advanced to fire 183 shells on Paris, causing many Parisians to flee the city. The initial stages of the offensive were so successful that Wilhelm II declared March 24 a national holiday. Many Germans thought victory to be close. However, supply shortages and attrition caused the German offensive to halt. German casualties between March and April 1918 were 270,000.

United States divisions, which Pershing sought to field as an independent force, were assigned to depleted French and British Empire commands on 28 March. A supreme command of Entente forces was created at the Doullers conference in which British Field Marshal Douglas Haig handed control of his forces over to Ferdinand Foch.

Following Operation Michael, Germany launched Operation Georgette to the north against the Channel ports. This was halted with less significant territorial gains.

Operations Blucher and Yorck were then conducted by the German Army to the south, broadly towards Paris.

Operation Marne was then launched on 15 July as an attempt to encircle Reims, beginning the Second Battle of the Marne. The resulting Entente counter attack marked the first successful Entente's offensive of the war. By July 20, 1918, the Germans were at their Kaiserschlacht starting lines. Following the last phase, the German Army never again held the initiative.

Meanwhile, Germany was crumbling internally as well. Anti-war marches were a frequent occurrence and morale within the army was at low levels. Industrial output had fallen 53% from 1913.

On August 8, 1918, the predicted counter-offensive occurred. It involved 414 tanks of the Mark IV and Mark V type, and 120,000 men. The Entente forces had advanced twelve kilometres into German held territory in just seven hours. Erich Ludendorff referred to this day as "the Black Day of the German army".

Entente's victory

Throughout World War I, Entente forces were stalled at trenches on the Western Front.

However, after a few days the offensive had slowed down"” British Empire units had encountered problems with all but seven of their 414 tanks. On August 15, 1918, Haig called an end to the offensive and began to plan for an offensive in Albert. That offensive came on August 21. Some 130,000 United States troops were involved, along with soldiers from British Third Army and Fourth armies. The offensive was an overwhelming success. The German Second Army had been pushed back over a 55 kilometre front. The town of Bapaume was captured on August 29 and by September 2, the Germans had been forced back to the Hindenburg Line.

The attempt to take the Hindenburg Line occurred on September 26 (known as the Meuse-Argonne Offensive): 260,000 American soldiers went "over the top" towards the Hindenburg Line. All divisions were successful in capturing their initial objectives, except the 79th division of the AEF. They met stiff resistance at Montfaucon and were unable to progress. This failure allowed the Germans to recover and regroup. Montfaucon was captured on September 27; however, failure to take it the day before proved to be one of the most costly mistakes of the entire campaign.

By the start of October it was evident that things were not going according to plan for the Germans. Many tanks were once again breaking down, and those that were actually operable were rendered useless due to tank commanders finding the terrain impossible to navigate. Regardless of this, Ludendorff had decided by October 1 that Germany had two ways out"”total annihilation or an armistice. He recommended the latter to senior figures at a summit in Spa, Belgium on that very same day. Pershing continued to pound the exhausted and bewildered Germans without relent for all of October along the Meuse-Argonne front. This would continue until the end of the war.

Meanwhile, news of Germany's impending defeat had spread throughout the German Armed forces. The threat of mutiny was rife. Naval commander Admiral Scheer and Ludendorff decided to launch a last ditch attempt to restore the "valour" of the German navy. He knew that any such action would be vetoed by the government of Max von Baden, so he made the decision not to inform him. Via word of mouth or otherwise, word of the impending assault reached sailors at Kiel. Many of the sailors took unofficial leave"”refusing to be part of an offensive which they believed to be nothing more than a suicide bid. It was mostly Ludendorff who took the fall for this"”the Kaiser dismissing him on October 26.

However, since the end of September 1918 Ludendorff had been concocting a plan of his own. Although he was a traditionalist conservative, he decided to try and incite a political revolution by introducing new reforms that "democratized" Germany; also satisfying the monarchists as the Kaiser's reign would continue unabridged. He believed that democratization would show the German people that the government was prepared to change, thus reducing the chance of a socialist style revolt as was seen in Russia in 1917. However, it is the belief of some historians that by doing so Ludendorff had an ulterior motive. His reforms would hand more power over to the members of the Reichstag"”particularly the ruling parties, at this time the centre party (under Matthias Erzberger), the liberals, and the social democrats. Therefore, with Ludendorff handing more power to these parties they would have the authority to request an armistice. With 5,989,758 Germans casualties (4,216,058 wounded, 1,773,700 killed), they did just that. Soon after that, Ludendorff had a dramatic change of heart"”and began to claim that the very parties who he handed power to had lost Germany the war. These politicians had "stabbed Germany in the back". Prince Max von Baden (SDP) was put in charge. Negotiations for a peace were immediately put into place on his appointment. Also, he was torn between the idea of a constitutional monarchy or complete abolition. However, the matter was taken out of his hands by Philipp Scheidemann, who on November 9, 1918, declared Germany a Republic from a balcony atop the Reichstag. Von Baden announced that the Kaiser was to abdicate"”before the Kaiser had himself made up his mind. Imperial Germany had died, and a new Germany had been born: the Weimar Republic.

End of the war

Front page of the New York Times on Armistice Day, November 11, 1918.

Bulgaria was the first of the Central Powers to sign an armistice (September 29, 1918). Germany requested a cease-fire on October 3, 1918. When Wilhelm II ordered the German High Seas Fleet to sortie against the Entente's navies, they mutinied in Wilhelmshaven starting October 29, 1918. On October 30 the Ottoman Empire capitulated. On November 3 Austria-Hungary sent a flag of truce to the Italian Commander to ask an Armistice and terms of peace. The terms having been arranged by telegraph with the Entente Authorities in Paris, were communicated to the Austrian Commander, and were accepted. The Armistice with Austria was granted to take effect at three o'clock on the afternoon of November 4. Austria and Hungary had signed separate armistices following the overthrow of the Habsburg monarchy.

Following the outbreak of the German Revolution, a Republic was proclaimed on November 9, marking the end of the German Empire. The Kaiser fled the next day to the Netherlands, which granted him political asylum. (See Weimar Republic for details.) On November 11 Germany signed in a railroad car at Compiègne, in France, an armistice with the Entente. On the eleventh day of the eleventh month at the eleventh hour it was official, the war was over.

For data on military and civilian deaths by nationality, see World War I casualties.

Social effects

One of the distinguishing features of the war was its totality. All aspects of the societies fighting were affected by the conflict, often causing profound social change, even if the countries were not in the war zone.

One of the most dramatic such effects was the expansion of government, its powers and responsibilities in Britain, France, the United States, and the Dominions of the British Empire. In order to harness all the power of their societies, new government ministries and powers were created. New taxes were levied, and laws enacted, all designed to bolster the war effort, many of which have lasted to this day.

At the same time, the war strained the abilities of the formerly large and bureaucratized governments such as in Austria-Hungary and Germany. Here, however, the long term effects were clouded by the defeat of these governments.

Families were altered by the departure of many men. With the death or absence of the primary wage earner women were forced into the workforce in unprecedented numbers, at least in many of the Entente powers. At the same time, industry needed to replace the lost labourers sent to war. This aided the struggle for voting rights for women.

At the outbreak of the war, it was a widely held belief that the war would usher in a new age of humanity. In reality, the war failed to deliver on both sides. For combatants and non-combatants alike, the war had been justified for reasons future generations simply would not be able to understand without seeing the war in the context of the "spirit of 1914". Instead of feeling jubilation, the victors entered a period of mourning. For the defeated, the post-war world was an even greater disappointment, for the Treaty of Versailles was a bitter pill to swallow after the armistice.

The severity of the treaty helped to raise suspicions about the Weimar Republic. Germany's new democratic government became associated with the treaty in the public eye. At the same time, the nature of Germany's defeat became another topic of controversy. Accounts from soldiers at the front, as well as the statements made by influencial figures such as Ludendorff, seemed to confirm the theory that Germany had not really lost the war. Instead, it was proposed that Germany had been betrayed from within. The Dolchstoßlegende (literally dagger push legend) suggested that Germany had been "stabbed in the back" by those not committed to the cause. Jews and communists quickly became targets of accusation.

The popularity of the Dolchstoßlegende helped to garner support for the movement for National Socialism. It has also been proposed that the experience of the war established with German youths a militaristic and fascist mindset that made it possible for the Nazi party to take control of Germany two decades later. In the aftermath of WWI, post-war depression and nationalist (retributionist) views were a prominent aspect of German public sentiment; an important cornerstone of what would become Nazi ideology.

Technology

Nieuport Fighter, France 1917

See also: Technological escalation during World War I

The First World War was different from prior military conflicts: it was a meeting of 20th century technology with 19th century mentality and tactics. This time, millions of soldiers, both volunteers and conscripts fought on all sides with Kitchener's Army being a notable volunteer force.

Much of the war's combat involved trench warfare, where hundreds often died for each metre of land gained. Many of the deadliest battles in history occurred during the First World War. Such battles include Ypres, Vimy Ridge, Marne, Cambrai, Somme, Verdun, and Gallipoli. Artillery was responsible for the largest number of casualties during the First World War.

The First World War also saw the use of chemical warfare and aerial bombardment, both of which had been outlawed under the 1907 Hague Convention.

Chemical warfare was a major distinguishing factor of the war. Gases used ranged from tear gas to disabling chemicals such as mustard gas and killing agents like phosgene. Only a small proportion of casualties were caused by gas, but it achieved harassment and psychological effects. Effective countermeasures to gas were found in gas masks and hence in the later stages of the war, as the use of gas increased, in many cases its effectiveness was diminished.

Fixed-wing aircraft were first used militarily during the First World War. Initial uses consisted principally of reconnaissance, though this developed into ground-attack and fighter duties as well. Strategic bombing aircraft were created principally by the Germans and British, though the former used Zeppelins to this end as well.

U-boats, or submarines were first used in combat shortly after the war began. Alternating between restricted and unrestricted submarine warfare during the First Battle of the Atlantic, they were employed by the Kaiserliche Marine in a strategy of weakening the British Empire by attacking its merchant shipping. In 1915, the RMS Lusitania liner was sunk with United States citizens aboard, affecting the United States' entry into the war.

Tanks were developed and used for the first time during this war.

Aftermath

In the trenches

Main articles: Aftermath of World War I, World War I casualties

The First World War ended with a Europe scarred by trenches, spent of resources, and littered with the bodies of the millions who died in battle. The direct consequences of WWI brought many old regimes crashing to the ground, and ultimately, would lead to the end of 300 years of European hegemony.

No other war had changed the map of Europe so dramatically - four empires were shattered: The German, the Austro-Hungarian, the Ottoman and the Russian. Their four dynasties, the Hohenzollerns, the Habsburgs, the Ottomans, and the Romanovs, who had roots of power back to the days of the Crusades, all fell during or after the war.

Casualties

For more details, see World War I casualties.

Country	Casualties	Dead	Wounded
Russia	6,650,000	1,700,000	5,950,000
Germany	5,989,758	2,037,700	4,216,058
France	5,623,800	1,357,800	4,266,000
Austria-Hungary	4,820,000	1,200,000	3,620,000
British Empire*	2,998,583	908,371	2,090,300
Italy	1,597,000	650,000	947,000
Serbia	1,700,000	450,000	950,000
Ottoman Empire	725,000	325,000	400,000
Romania	455,706	335,706	120,000
United States***	360,300	126,000	234,300
Bulgaria	239,890	87,500	152,390
Canada*	239,605	66,655	172,950
Australia*	218,501	59,330	159,171
Montenegro	60,000	50,000	10,000
Belgium	58,402	13,716	44,686
Greece	26,000	5,000	21,000
Portugal	20,973	7,222	13,751
Newfoundland**	3,565	1,251	2,314
Japan	1,207	300	907
Totals	31,266,438	9,381,551	23,148,975

* British Empire includes Canadian, Australian, and Indian casualties.
** Newfoundland was a dominion at the time, and not part of Canada.
*** United States official figures, given April 1, 1920 read: 35,560 killed in action; 14,720 died of wounds; 57,460 died of disease; 7,920 died of other causes; 205,690 wounded; 46 missing; 4,480 prisoners. Source: The Communication Trench, Anecdotes & Statistics from The Great War 1914-1918 by Will R. Bird (pg. 75)

Other Names

World War I has also been called called "The Great War" (a title previously used to refer to the Napoleonic Wars) or sometimes "the war to end all wars" until World War II. The term "First World War," implying an event distinct from a "Second World War" has fallen into disfavour by some scholars, who regard World War I as merely the first phase of a three-decade long war spanning the period 1914"“1945. Other scholars view World War I as one of the consequences of French indignation at the French defeat in the Franco-Prussian War that would lead France to exploit a Balkan crisis as a precept for a general war. Scholars have also cited German diplomatic ineptitude as well as a tremendous tide of nationalism that swept the European continent at this time.

Quotations

"Yesterday I visited the battlefield of last year. The place was scarcely recognisable. Instead of a wilderness of ground torn up by shell, the ground was a garden of wild flowers and tall grasses. Most remarkable of all was the appearance of many thousands of white butterflies which fluttered around. It was as if the souls of the dead soldiers had come to haunt the spot where so many fell. It was eerie to see them. And the silence! It was so still that I could almost hear the beat of the butterflies' wings." (A British officer, 1919.)

"The First World War killed fewer victims than the Second World War, destroyed fewer buildings, and uprooted millions instead of tens of millions - but in many ways it left even deeper scars both on the mind and on the map of Europe. The old world never recovered from the shock." --Edmond Taylor, in "The Fossil Monarchies"

"In Flanders fields the poppies blow| Between the crosses, row on row,| That mark our place; and in the sky| The larks, still bravely singing, fly| Scarce heard amid the guns below."

--John McCrae, from the poem "In Flanders Fields"

References

• Herwig, Holger H. Operation Michael: The "Last Card". University of Calgary, 2001. Available online, accessed 11 February 2005.
• Taylor, A. J. P. The First World War: An Illustrated History. Hamish Hamilton, 1963.
• Pope, Stephen and Wheal, Elizabeth-Anne, eds.The Macmillian Dictionary of the First World War. Macmillian Reference Books, 1995.
• Ponting, Clive. Thirteen Days. Chatto & Windus, London, 2002.

See also

• World War I Battles
• World War I casualties
• Armenian Genocide
• Austria-Hungary's ultimatum to Serbia
• Treaty of Versailles
• People of World War I
• Female roles in the world wars
• Trench warfare
• Use of poison gas in World War I
• Aircraft of World War I
• The use of railways
• Portugal in World War I
• Literature of World War I
• "Gott strafe England"
• List of battles of World War I

Media

Wikimedia Commons has more media related to: World War I

Bombers of WWI (info) Video clip of allied bombing runs over German lines. Tanks of WWI (info) Primitive WWI tanks help the Allies with an advance in Langres, France (1918). Problems seeing the videos? Media help.

General

• History of Europe
• History of the Balkans
• Polish-Soviet War
• List of battles 1901-2000
• Latin Monetary Union (1865-1927)
• List of battles of World War I
• Turkish War of Independence

Further reading

For more details on the subject, consult these histories:

• Hew Strachan ed.: "The Oxford Illustrated History of the First World War" is a collection of chapters from various scholars that survey the War.
• Hew Strachan: "The First World War: Volume I: to arms" puts emphasis on the extra-European war, but gives extensive coverage of the war on the Western and Eastern Fronts in 1914.
• Barbara Tuchman: The Guns of August tells of the opening diplomatic and military manoeuvres.
• The Great War television documentary by the BBC
• Michael J. Lyons. World War I: A Short History (2nd Edition). Upper Saddle River, NJ: Prentice Hall, 1999.

External links

Wikisource has original text related to this article: World War I

• First World War.com "A multimedia history of World War One"
• The war to end all wars on BBC site
• "The Heritage of the Great War" with numerous pictures
• GenealogyBuff.com - World War I Casualty Reports for the US Army 1918
• The British Army in the Great War
• World War I, Wars And Battles
• World War I rap, by Jonathan Pagel
• Encyclopaedia of the First World War
• A "Revisionist Historian's" Account of the Cause of World War I
• Trenches on the Web
• Online World War I Records & Indexes
• World War I Document Archive
• World War I Naval Combat
• Pre-war German Army
• Wanted! 500 000 Canadians for WW I "” Illustrated Historical Essay
• Memoirs of the Great War - a personal account in diary format of one mans experiences throughout the great war.

Source: en.wikipedia.org
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