World War I

Table columns:
Date
Location
Result
Allied Powers  France  British Empire  Russia (until 1917)  Serbia  Belgium  Montenegro  Japan  Italy (1915–18)  United States (1917–18)  Romania (1916–18)  Portugal (1916–18)  Hejaz (1916–18)  China (1917–18)  Greece (1917–18)  Siam (1917–18) ...and others
Allied leaders  Raymond Poincaré  Georges Clemenceau  H. H. Asquith  David Lloyd George  Nicholas II  Victor Emmanuel III  Vittorio Orlando  Woodrow Wilson  Yoshihito  Peter I  Ferdinand I  Eleftherios Venizelos ...and others
12,000,000  8,841,541[1][2]  8,660,000[3]  5,615,140  4,743,826  1,234,000  800,000  707,343  380,000  250,000  50,000 Total: 42,959,850[4]
Military dead: 5,525,000 Military wounded: 12,831,500 Total: 18,356,500 KIA, WIA and MIA Civilian dead: 4,000,000 ...further details.

Table rows:
cells: World War I
Top to bottom, starting with left row: British warships in the North Sea during the Battle of Jutland German soldier sharing a cigarette with a British POW Australian troops walk on duckboards through a decimated landscape during the Battle of Passchendaele Field Marshal Paul von Hindenburg and General Erich Ludendorff ANZAC Cove cove during the Gallipoli Campaign US soldiers in the Meuse-Argonne Offensive A crowded French trench on the Western Front in 1917 German Machine Gun Section during the Battle of Verdun German Artillery on the Eastern Front Albatros D.III fighters of Jagdstaffel 11
Date 28 July 1914 – 11 November 1918 (4 years, 3 months and 2 weeks) Peace treaties[show] 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 of Sèvres Signed 10 August 1920 (6 years, 1 week and 6 days)[c] United States–Austria Peace Treaty Signed 24 August 1921 (3 years, 8 months, 2 weeks and 3 days)[d][e] United States–Germany Peace Treaty Signed 25 August 1921 (4 years, 4 months, 2 weeks and 5 days)[f] United States–Hungary Peace Treaty Signed 29 August 1921 (3 years, 8 months, 3 weeks and 1 day)[g] Treaty of Lausanne Signed 24 July 1923 (8 years, 8 months, 3 weeks and 4 days)[h] Location Europe, Africa, the Middle East, the Pacific Islands, China, Indian Ocean, and off the coast of South and North America Result Allied victory Central Powers' victory on the Eastern Front nullified by defeat on the Western Front Fall of the German, Russian, Ottoman, and Austro-Hungarian empires Russian Civil War and foundation of the Soviet Union Formation of new countries in Europe and the Middle East Transfer of German colonies and regions of the former Ottoman Empire to other powers Establishment of the League of Nations. (more...)
28 July 1914 – 11 November 1918 (4 years, 3 months and 2 weeks) Peace treaties[show] 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 of Sèvres Signed 10 August 1920 (6 years, 1 week and 6 days)[c] United States–Austria Peace Treaty Signed 24 August 1921 (3 years, 8 months, 2 weeks and 3 days)[d][e] United States–Germany Peace Treaty Signed 25 August 1921 (4 years, 4 months, 2 weeks and 5 days)[f] United States–Hungary Peace Treaty Signed 29 August 1921 (3 years, 8 months, 3 weeks and 1 day)[g] Treaty of Lausanne Signed 24 July 1923 (8 years, 8 months, 3 weeks and 4 days)[h]
Europe, Africa, the Middle East, the Pacific Islands, China, Indian Ocean, and off the coast of South and North America
Allied victory Central Powers' victory on the Eastern Front nullified by defeat on the Western Front Fall of the German, Russian, Ottoman, and Austro-Hungarian empires Russian Civil War and foundation of the Soviet Union Formation of new countries in Europe and the Middle East Transfer of German colonies and regions of the former Ottoman Empire to other powers Establishment of the League of Nations. (more...)
Belligerents
Central Powers  German Empire  Austria-Hungary  Ottoman Empire  Bulgaria (1915–18) ...and co-belligerents
Commanders and leaders
Central Powers leaders  Wilhelm II  Franz Joseph I †  Karl I  Mehmed V †  Mehmed VI  Three Pashas  Ferdinand I ...and others
Strength
13,250,000  7,800,000  2,998,321  1,200,000 Total: 25,248,321[4]
Casualties and losses
Military dead: 4,386,000 Military wounded: 8,388,000 Total: 12,774,000 KIA, WIA and MIA Civilian dead: 3,700,000 ...further details.

Questions about this table:
originalText: when was first world war started and ended
answer: answerTexts: 28 July 1914 – 11 November 1918