World War I

World War I

World War I, 1914-18, also known as the Great War, conflict, chiefly in Europe, among most of the great Western powers. It was the largest war the world had yet seen.


World War I was immediately precipitated by the assassination of Archduke Francis Ferdinand of Austria-Hungary by a Serbian nationalist in 1914. There were, however, many factors that had led toward war. Prominent causes were the imperialistic, territorial, and economic rivalries that had been intensifying from the late 19th cent., particularly among Germany, France, Great Britain, Russia, and Austria-Hungary.

Of equal importance was the rampant spirit of nationalism, especially unsettling in the empire of Austria-Hungary and perhaps also in France. Nationalism had brought the unification of Germany by "blood and iron," and France, deprived of Alsace and Lorraine by the Franco-Prussian War of 1870-71, had been left with its own nationalistic cult seeking revenge against Germany. While French nationalists were hostile to Germany, which sought to maintain its gains by militarism and alliances, nationalism was creating violent tensions in the Austro-Hungarian Monarchy; there the large Slavic national groups had grown increasingly restive, and Serbia as well as Russia fanned Slavic hopes for freedom and Pan-Slavism.

Imperialist rivalry had grown more intense with the "new imperialism" of the late 19th and early 20th cent. The great powers had come into conflict over spheres of influence in China and over territories in Africa, and the Eastern Question, created by the decline of the Ottoman Empire, had produced several disturbing controversies. Particularly unsettling was the policy of Germany. It embarked late but aggressively on colonial expansion under Emperor William II, came into conflict with France over Morocco, and seemed to threaten Great Britain by its rapid naval expansion.

These issues, imperialist and nationalist, resulted in a hardening of alliance systems in the Triple Alliance and Triple Entente and in a general armaments race. Nonetheless, a false optimism regarding peace prevailed almost until the onset of the war, an optimism stimulated by the long period during which major wars had been avoided, by the close dynastic ties and cultural intercourse in Europe, and by the advance of industrialization and economic prosperity. Many Europeans counted on the deterrent of war's destructiveness to preserve the peace.

War's Outbreak

The Austrian annexation (1908) of Bosnia and Herzegovina created an international crisis, but war was avoided. The Balkan Wars (1912-13) remained localized but increased Austria's concern for its territorial integrity, while the solidification of the Triple Alliance made Germany more yielding to the demands of Austria, now its one close ally. The assassination (June 28, 1914) of Archduke Francis Ferdinand at Sarajevo set in motion the diplomatic maneuvers that ended in war.

The Austrian military party, headed by Count Berchtold, won over the government to a punitive policy toward Serbia. On July 23, Serbia was given a nearly unacceptable ultimatum. With Russian support assured by Sergei Sazonov, Serbia accepted some of the terms but hedged on others and rejected those infringing upon its sovereignty. Austria-Hungary, supported by Germany, rejected the British proposal of Sir Edward Grey (later Lord Grey of Fallodon) and declared war (July 28) on Serbia.

Russian mobilization precipitated a German ultimatum (July 31) that, when unanswered, was followed by a German declaration of war on Russia (Aug. 1). Convinced that France was about to attack its western frontier, Germany declared war (Aug. 3) on France and sent troops against France through Belgium and Luxembourg. Germany had hoped for British neutrality, but German violation of Belgian neutrality gave the British government the pretext and popular support necessary for entry into the war. In the following weeks Montenegro and Japan joined the Allies (Great Britain, France, Russia, Serbia, and Belgium) and the Ottoman Empire joined the Central Powers (Germany and Austria-Hungary). The war had become general. Whether it might have been avoided or localized and which persons and nations were most responsible for its outbreak are questions still debated by historians.

From the Marne to Verdun

The German strategy, planned by Alfred von Schlieffen, called for an attack on the weak left flank of the French army by a massive German force approaching through Belgium, while maintaining a defensive stance toward Russia, whose army, Schlieffen assumed, would require six weeks to mobilize. By that time, Germany would have captured France and would be ready to meet the forces on the Eastern Front. The Schlieffen plan was weakened from the start when the German commander Helmuth von Moltke detached forces from the all-important German right wing, which was supposed to smash through Belgium, in order to reinforce the left wing in Alsace-Lorraine. Nevertheless, the Germans quickly occupied most of Belgium and advanced on Paris.

In Sept., 1914, the first battle of the Marne (see Marne, battle of the) took place. For reasons still disputed, a general German retreat was ordered after the battle, and the Germans entrenched themselves behind the Aisne River. The Germans then advanced toward the Channel ports but were stopped in the first battle of Ypres (see Ypres, battles of); grueling trench warfare ensued along the entire Western Front. Over the next three years the battle line remained virtually stationary. It ran, approximately, from Ostend past Armentières, Douai, Saint-Quentin, Reims, Verdun, and Saint-Mihiel to Lunéville.

Meanwhile, on the Eastern Front, the Russians invaded East Prussia but were decisively defeated (Aug.-Sept., 1914) by the Germans under generals Hindenburg, Ludendorff, and Mackensen at Tannenberg and the Masurian Lakes (see under Masuria). The Germans advanced on Warsaw, but farther south a Russian offensive drove back the Austrians. However, by the autumn of 1915 combined Austro-German efforts had driven the Russians out of most of Poland and were holding a line extending from Riga to Chernovtsy (Chernivtsi). The Russians counterattacked in 1916 in a powerful drive directed by General Brusilov, but by the year's end the offensive had collapsed, after costing Russia many thousands of lives. Soon afterward the Russian Revolution eliminated Russia as an effective participant in the war. Although the Austro-Hungarians were unsuccessful in their attacks on Serbia and Montenegro in the first year of the war, these two countries were overrun in 1915 by the Bulgarians (who had joined the Central Powers in Oct., 1915) and by Austro-German forces.

Another blow to the Allied cause was the failure in 1915 of the Gallipoli campaign, an attempt to force Turkey out of the war and to open a supply route to S Russia. The Allies, however, won a diplomatic battle when Italy, after renouncing its partnership in the Triple Alliance and after being promised vast territorial gains, entered the war on the Allied side in May, 1915. Fighting between Austria and Italy along the Isonzo River was inconclusive until late 1917, when the rout of the Italians at Caporetto made Italy a liability rather than an asset to the Allies.

Except for the conquest of most of Germany's overseas colonies by the British and Japanese, the year 1916 opened with a dark outlook for the Allies. The stalemate on the Western Front had not been affected in 1915 by the second battle of Ypres, in which the Germans used poison gas for the first time on the Western Front, nor by the French offensive in Artois—in which a slight advance of the French under Henri Pétain was paid for with heavy losses—nor by the offensive of Marshal Joffre in Champagne, nor by the British advance toward Lens and Loos.

In Feb., 1916, the Germans tried to break the deadlock by mounting a massive assault on Verdun (see Verdun, battle of). The French, rallying with the cry, "They shall not pass!" held fast despite enormous losses, and in July the British and French took the offensive along the Somme River where tanks were used for the first time by the British. By November they had gained a few thousand yards and lost thousands of men. By December, a French counteroffensive at Verdun had restored the approximate positions of Jan., 1916.

Despite signs of exhaustion on both sides, the war went on, drawing ever more nations into the maelstrom. Portugal and Romania joined the Allies in 1916; Greece, involved in the war by the Allied Salonica campaigns on its soil, declared war on the Central Powers in 1917.

From America's Entry to Allied Victory

The neutrality of the United States had been seriously imperiled after the sinking of the Lusitania (1915). At the end of 1916, Germany, whose surface fleet had been bottled up since the indecisive battle of Jutland (see Jutland, battle of), announced that it would begin unrestricted submarine warfare in an effort to break British control of the seas. In protest the United States broke off relations with Germany (Feb., 1917), and on Apr. 6 it entered the war. American participation meant that the Allies now had at their command almost unlimited industrial and manpower resources, which were to be decisive in winning the war. It also served from the start to lift Allied morale, and the insistence of President Woodrow Wilson on a "war to make the world safe for democracy" was to weaken the Central Powers by encouraging revolutionary groups at home.

The war on the Western Front continued to be bloody and stalemated. But in the Middle East the British, who had stopped a Turkish drive on the Suez Canal, proceeded to destroy the Ottoman Empire; T. E. Lawrence stirred the Arabs to revolt, Baghdad fell (Mar., 1917), and Field Marshal Allenby took Jerusalem (Dec., 1917). The first troops of the American Expeditionary Forces (AEF), commanded by General Pershing, landed in France in June, 1917, and were rushed to the Château-Thierry area to help stem a new German offensive.

A unified Allied command in the West was created in Apr., 1918. It was headed by Marshal Foch, but under him the national commanders (Sir Douglas Haig for Britain, King Albert I for Belgium, and General Pershing for the United States) retained considerable authority. The Central Powers, however, had gained new strength through the Treaty of Brest-Litovsk (Mar., 1918) with Russia. The resources of Ukraine seemed at their disposal, enabling them to balance to some extent the effects of the Allied blockade; most important, their forces could now be concentrated on the Western Front.

The critical German counteroffensive, known as the second battle of the Marne, was stopped just short of Paris (July-Aug., 1918). At this point Foch ordered a general counterattack that soon pushed the Germans back to their initial line (the so-called Hindenburg Line). The Allied push continued, with the British advancing in the north and the Americans attacking through the Argonne region of France. While the Germans were thus losing their forces on the Western Front, Bulgaria, invaded by the Allies under General Franchet d'Esperey, capitulated on Sept. 30, and Turkey concluded an armistice on Oct. 30. Austria-Hungary, in the process of disintegration, surrendered on Nov. 4 after the Italian victory at Vittorio Veneto.

German resources were exhausted and German morale had collapsed. President Wilson's Fourteen Points were accepted by the new German chancellor, Maximilian, prince of Baden, as the basis of peace negotiations, but it was only after revolution had broken out in Germany that the armistice was at last signed (Nov. 11) at Compiègne. Germany was to evacuate its troops immediately from all territory W of the Rhine, and the Treaty of Brest-Litovsk was declared void. The war ended without a single truly decisive battle having been fought, and Germany lost the war while its troops were still occupying territory from France to Crimea. This paradox became important in subsequent German history, when nationalists and militarists sought to blame the defeat on traitors on the home front rather than on the utter exhaustion of the German war machine and war economy.

Aftermath and Reckoning

World War I and the resulting peace treaties (see Versailles, Treaty of; Saint-Germain, Treaty of; Trianon, Treaty of; Neuilly, Treaty of; Sèvres, Treaty of) radically changed the face of Europe and precipitated political, social, and economic changes. By the Treaty of Versailles Germany was forced to acknowledge guilt for the war. Later, prompted by the Bolshevik publication of the secret diplomacy of the czarist Russian government, the warring powers gradually released their own state papers, and the long historical debate on war guilt began. It has with some justice been claimed that the conditions of the peace treaties were partially responsible for World War II. Yet when World War I ended, the immense suffering it had caused gave rise to a general revulsion to any kind of war, and a large part of mankind placed its hopes in the newly created League of Nations.

To calculate the total losses caused by the war is impossible. About 10 million dead and 20 million wounded is a conservative estimate. Starvation and epidemics raised the total in the immediate postwar years. Warfare itself had been revolutionized by the conflict (see air forces; chemical warfare; mechanized warfare; tank).


There is a tremendous amount of general and specialized literature on World War I. Classic accounts of the war are S. B. Fay, The Origins of the World War (rev. ed. 1930, repr. 1966) and B. E. Schmitt, The Coming of the War, 1914 (1930, repr. 1966). Two short guides to the military history are B. H. Liddell Hart, The Real War (1930, repr. 1963), and H. W. Baldwin, World War I (1962).

See also W. S. Churchill, The World Crisis (6 vol., 1923-31; repr. 1970); B. H. Liddell Hart, A History of the World War, 1914-1918 (1934); B. Tuchman, The Guns of August (1962); L. LaFore, The Long Fuse (1965); F. Fischer, Germany's Aims in the First World War (tr. 1967); G. P. Hayes, World War I: A Compact History (1972); P. Fussell, The Great War and Modern Memory (1975); D. M. Kennedy, Over Here: The First World War and American Society (1980); G. F. Kennan, The Fateful Alliance: France, Russia, and the Coming of the First World War (1984); M. Ferro, The Great War (1987); T. Travers, The Killing Ground (1987, repr. 2004); D. Stevenson, The First World War and International Politics (1988) and Cataclysm (2004); M. and S. Harries, The Last Days of Innocence (1997); H. Strachan, ed., World War I (1998) and, as author, The First World War (Vol. I, 2001) and The First World War (2004); N. Ferguson, The Pity of War (1999); J. Keegan, The First World War (1999); J. S. D. Eisenhower, Yanks (2001); E. D. Brose, The Kaiser's Army (2001); D. Fromkin, Europe's Last Summer (2004).

The number of World War I casualties, both military and civilian, was over 40 million — 20 million deaths and 21 million wounded. This includes 9.7 million military deaths and about 10 million civilian deaths. The Entente Powers (also known as the Allies) lost more than 5 million soldiers and the Central Powers about 4 million.

Classification of Casualty Statistics

Estimates for World War I casualty numbers vary to a great extent. Military casualty statistics listed here include combat related deaths as well as losses caused by accidents, disease and prisoner of war deaths. The table lists total deaths; the footnotes give a breakout between combat and non-combat losses.
Most civilian deaths during World War I were due to war related famine and disease. Civilian deaths due to the Spanish flu have been excluded from these figures, whenever possible. Furthermore, estimates of civilian deaths include the Armenian Genocide, and it is debated to which degree this event should be included.
The data listed here is from official sources, whenever available. These sources are cited below.

Casualties by country

Entente Powers Population Millions Military Deaths Civilian Deaths Total Deaths Military Wounded
align=left 4.5 61,928 61,928 152,171
align=left 7.4 42,987 62,000 104,987 44,686
align=left 7.2 64,944 2,000 66,944 149,732
align=left 39.6 1,397,800 300,000 1,697,800 4,266,000
align=left 4.8 26,000 150,000 176,000 21,000
Indian Empire 315.1 74,187 74,187 69,214
align=left 35.6 651,010 589,000 1,240,010 953,886
align=left 53.6 415 415 907
align=left 0.3
align=left .5 3,000 3,000 10,000
align=left 1.1 18,050 18,050 41,317
align=left .2 1,204 1,204 2,314
align=left 6.0 7,222 82,000 89,222 13,751
align=left 7.5 250,000 430,000 680,000 120,000
align=left 158.9 1,811,000 1,500,000 3,311,000 4,950,000
align=left 4.5 275,000 450,000 725,000 133,148
align=left 6.0 9,463 9,463 12,029
United Kingdom of Great Britain and Ireland 45.4 885,138 109,000 994,138 1,663,435
align=left 92.0 116,708 757 117,465 205,690
Total (Entente Powers) 790.2 5,696,056 3,674,757 9,370,813 12,809,280
Central Powers Population Millions Military Deaths Civilian Deaths Total Deaths Military Wounded
align=left 51.4 1,100,000 467,000 1,567,000 3,620,000
align=left 5.5 87,500 100,000 187,500 152,390
align=left 64.9 2,036,897 426,000 2,462,897 4,247,143
align=left 21.3 800,000 4,200,000 5,000,000 400,000
Total (Central Powers) 143.1 4,024,397 5,193,000 9,217,397 8,419,533
Neutral nations
align=left 2.7 722 722
align=left 2.4 - 1,892 1,892
align=left 5.6 - 877 877
Grand Total 941.3 9,720,453 8,871,248 18,591,701 21,228,813

Table sources

The main sources used for military and civilian deaths (unless stated otherwise in the footnotes below) are as follows:

  • The Commonwealth War Graves Commission Annual Report 2006-2007 is the source of the military dead for the UK, Australia, New Zealand, Canada, South Africa, and the Indian Empire. The war dead totals listed in the report are based on the research by the CWGC to identify and commemorate Commonwealth war dead. The totals include those killed or missing in action and died of wounds as well as deaths due to disease, accidents; deaths of prisoners of war, military deaths outside of combat theaters and war related deaths during 1919-1921. The report is available online at
  • Statistics of the Military Effort of the British Empire During the Great War 1914-1920, The War Office March 1922 -This report lists the deaths of 908,371 soldiers killed or missing in action; died of wounds; and POW deaths in the combat theaters from to 1914-18. The figures from the War Office report for the UK and Dominion nations are listed in the footnotes.The losses of Bulgaria and Portugal were also listed in the War Office report.
  • Casualties and Medical Statistics, 1931, the final volume of the Official Medical History of the War, gives a breakout of British Empire Army losses by cause of death. Total losses in combat theaters from 1914-1918 were 876,084, which included 418,361 killed, 167,172 died of wounds, 113,173 died of disease or injury, 161,046 missing and presumed dead and 16,332 prisoner of war deaths . These losses were not broken out for the UK and each Dominion..
  • Huber Michel,La Population de la France pendant la guerre, Paris 1931, This study published by the Carnegie Endowment for International Peace lists official data for war related military deaths and missing of France and its colonies.
  • Mortara, Giorgo. La Salute pubblica in Italia durante e dopo la Guerra, New Haven: Yale University Press 1925. The official government Italian statistics on war dead are listed here. A brief summary of data from this report can be found online at - (go to Vol 13, No. 15).
  • Urlanis, Boris Wars and Population, Moscow, 1971, Lists the military dead of Russia, Greece, Serbia and Montenegro.. Estimated combat related casualties; killed and missing in action or died of wounds are detailed for each nation. These figures are listed in the footnotes.
  • Heeres-Sanitätsinspektion im Reichskriegsministeriums, Sanitätsbericht über das deutsche Heer, (Deutsches Feld- und Besatzungsheer), im Weltkriege 1914-1918, Volume 3, Sec. 1, Berlin 1934.- The official German Army medical war history listed German losses.
  • Grebler, Leo and Winkler, Wilhelm The Cost of the World War to Germany and Austria-Hungary, Yale University Press, 1940, -This study published by the Carnegie Endowment for International Peace details the losses of Austria-Hungary and Germany in the war,
  • Erickson, Edward J. Ordered to Die: A History of the Ottoman Army in the First World War, Greenwood 2001, ISBN 0313315167. The data published here for casualties is from official Ottoman sources
  • Hersch, Liebmann, La mortalité causée par la guerre mondiale, Metron- The International Review of Statistics, 1927, Vol 7. No 1. Detailed the demographic impact of the war on France, the UK, Italy, Belgium, Portugal, Serbia, Romania and Greece.(This article is available for purchase from Metron )

The main source for military wounded (unless stated otherwise in the footnotes below) is:

  • Tucker, Spencer C. ed. The European Powers in the First World War: An Encyclopedia, Garland Publishing, New York, 1996.

The source of population data is.

  • Haythornthwaite, Philip J., The World War One Source Book Arms and Armour, 1993, 412 pages, ISBN 1854091026.


See also

Main article

World War I



  • -Everett, Susanne, World War I-An Illustrated History, Bison Books, 1980 ISBN 0671069330
  • -Nicolson, Colin, The Longman Companion to the First World War, Longman 2001, ISBN 0-582-28983-1
  • -Bird, Will R., The Communication Trench, Anecdotes & Statistics from The Great War 1914-1918. CEF Books, Ottawa, 2000. ISBN 1896979092
  • -Tucker, Spencer C. The European Powers in the First World War: An Encyclopedia, Garland Publishing, New York, 1999, ISBN 0-8153-3351-X
  • -Hirschfeld, Gerhard (Ed.), Enzyklopaedie Erster Weltkrieg, Paderborn, 2004, ISBN 3506739131 (esp. article "Kriegsverluste" by Ruediger Overmans P. 663-666)
  • -Urlanis, Boris, Wars and Population, Moscow, 1971
  • -Urlanis, Boris, Bilanz der Kriege, Berlin, 1965.
  • -Heeres-Sanitaetsinspektion im Reichskriegsministeriums, Sanitaetsbericht über das deutsche Heer, (deutsches Feld- und Besatzungsheer), im Weltkriege 1914-1918, Volume 3, Sec 1. Berlin 1934.
  • -Dumas, Samuel, Losses of Life Caused by War, Oxford 1923
  • Michael Clodfelter. Warfare and Armed Conflicts- A Statistical Reference to Casualty and Other Figures, 1500-2000. 2nd Ed. 2002 ISBN 0-7864-1204-6.
  • -Statistics of the Military Effort of the British Empire During the Great War 1914-1920, The War Office March 1922 -Reprinted by Naval & Military Press- ISBN 1847346812
  • -"Huber M.,La Population de la France pendant la guerre, Paris 1931
  • -"Bujac, Jean. Les campagnes de l'armèe Hellènique, 1918-1922, Paris, 1930
  • -Edward J. Erickson, Ordered to Die: A History of the Ottoman Army in the First World War, Greenwood 2001. ISBN 0313315167
  • -The Commonwealth War Graves Commission Debt of Honour Register.
  • -Grey, Randal Chronicle of the First World War, Vol II: 1917-1921, Facts On File, 1991. ISBN 0816025959
  • -Grebler, Leo- The Cost of the World War to Germany and Austria-Hungary, Yale University Press, 1940
  • Gilbert,Martin-Atlas of World War I, Oxford UP, 1994. ISBN 0195210778
  • Harries, Merion, Soldiers of the Sun-The Rise and Fall of the Imperial Japanese Army,Random House, 1991 ISBN 0679753036
  • Mortara, G. La Salute pubblica in Italia durante e dopo la Guerra, New Haven: Yale University Press 1925.
  • Mitchell, T.J. Casualties and Medical Statistics of the Great War London 1931; Reprinted by Battery Press, 1997 ISBN 0898392632
  • James L.Gelvin The Israel-Palestine Conflict: One Hundred Years of War Cambridge University Press ISBN 0521852890
  • L. Hersch, La mortalité causée par la guerre mondiale, Metron- The International Review of Statistics, 1927, Vol 7.
  • -Ellis, John World War I-Databook, Aurum Press, 1993 ISBN 1854107666
  • -Ayers, Leonard, The War With Germany- A Statistical Summary, US War Dept 1919.
  • -Österreichischen Bundesministerium für Herrswesen, Österreich-Ungarns letzer Kreig, 1914-1918. Vol. 7, Vienna 1938.
  • The Army Council. General Annual Report of the British Army 1912-1919. Parliamemtary Paper 1921, XX, Cmd.1193.
  • l'Annuaire statistique de la Belgique et du Congo Belge 1915-1919. Bruxelles 1922.
  • World War I casualties - from Twentieth Century Atlas
  • Horne, John and Kramer, Alan Kramer, German Atrocities, 1914 ISBN 0300089759
  • Haythornthwaite, Philip J. The World War One Sourcebook, Arms and Armour 1992 ISBN 1854091026
  • Richard Doody">Richard Doody The Grand Duchy of Luxembourg. Retrieved on 2006-07-23..

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