World War I
1914–1918 global war originating in Europe "World War One", "Great War", and "WW1" redirect here. For other uses, see World War One (disambiguation), Great War (disambiguation), and WW1 (album). World War I Clockwise from the top : The aftermath of shelling during the Battle of the Somme, Mark V tanks cross the Hindenburg Line, HMS Irresistible sinks after hitting a mine in the Dardanelles, a British Vickers machine gun crew wears gas masks during the Battle of the Somme, Albatros D.III fighters of Jagdstaffel 11 Date 28 July 1914 – 11 November 1918 ( 1914-07-28 – 1918-11-11 ) (4 years, 3 months and 2 weeks) Peace treaties Treaty of Versailles Signed 28 June 1919 (4 years and 11 months) [a] Treaty of Saint-Germain-en-Laye Signed 10 September 1919 (5 years, 1 month, 1 week and 6 days) Treaty of Neuilly-sur-Seine Signed 27 November 1919 (4 years, 1 month, 1 week and 6 days) [b] Treaty of Trianon Signed 4 June 1920 (5 years, 10 months and 1 week) Treaty o...