Category:World War 1

{| class="article-table" ! colspan="2" |World War I
 * colspan="2" |WWImontage.jpg
 * colspan="2" |Clockwise from the top:
 * colspan="2" |Clockwise from the top:
 * colspan="2" |Clockwise from the top:

! colspan="2" |Belligerents ! colspan="2" |Commanders and leaders
 * The road to Bapaume in the aftermath of the Battle of the Somme, 1916
 * British Mark V tanks crossing the Hindenburg Line, 1918
 * HMS Irresistible sinking after hitting a mine in the Dardanelles, 1915
 * A British Vickers machine gun crew wears gas masks during the Battle of the Somme, 1916
 * German Albatros D.III biplane fighters near Douai, France, 1917
 * colspan="2" |
 * colspan="2" |
 * Allied Powers:France
 * British Empire
 * Russia (until 1917)
 * Serbia
 * Belgium
 * Japan
 * Montenegro
 * Italy (from 1915)
 * United States (from 1917)
 * Romania (from 1916)
 * Portugal (from 1916)
 * Hejaz (from 1916)
 * Greece (from 1917)
 * Siam (from 1917)
 * China (from 1917)
 * ... and others
 * Central Powers:
 * Germany
 * Austria-Hungary Austria-Hungary
 * Ottoman Empire
 * Bulgaria (from 1915)
 * ... and others
 * ... and others
 * Raymond Poincaré
 * Georges Clemenceau
 * Herbert H. Asquith
 * David Lloyd George
 * Nicholas II
 * Alexander Kerensky
 * Victor Emmanuel III
 * Vittorio Orlando
 * Woodrow Wilson
 * Yoshihito
 * Albert I
 * Peter I
 * Ferdinand I and others ...
 * Wilhelm II
 * Franz Joseph I †
 * Karl I
 * Mehmed V †
 * Mehmed VI
 * Three Pashas
 * Ferdinand I and others ...
 * Mehmed VI
 * Three Pashas
 * Ferdinand I and others ...

World War I (or the First World War, often abbreviated as WWI or WW1) was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. Contemporaneously known as the Great War or "the war to end all wars", it led to the mobilisation of more than 70 million military personnel, including 60 million Europeans, making it one of the largest wars in history. It is also one of the deadliest conflicts in history, with an estimated 9 million combatant deaths and 13 million civilian deaths as a direct result of the war, while resulting genocides and the related 1918 Spanish flu pandemic caused another 17–100 million deaths worldwide, including an estimated 2.64 million Spanish flu deaths in Europe and as many as 675,000 Spanish flu deaths in the United States.