World War I By Kenzie33 1914 Archduke Franz Ferdinand killed Political instability in the Balkans threatened to destroy some agreements they had with the Ottoman power and Russia. https://www.history.com/topics/world-war-i/world-war-i-history Aug 1, 1914 Germany declares war https://www.britannica.com/list/timeline-of-world-war-i Sep 6, 1914 Battle of the Marne begins https://www.britannica.com/list/timeline-of-world-war-i Nov 5, 1914 Britain and France declare war on Ottoman Empire https://www.britannica.com/list/timeline-of-world-war-i Apr 22, 1915 Battle of Ypres begins https://www.britannica.com/list/timeline-of-world-war-i May 17, 1915 Lusitania is torpedoed by Germans https://www.britannica.com/list/timeline-of-world-war-i Feb 21, 1916 Battle of Verdun begins https://www.britannica.com/list/timeline-of-world-war-i Jul 1, 1916 Battle of Somme begins https://www.britannica.com/list/timeline-of-world-war-i Mar 15, 1917 Tsar Nicholas II take the thrown in Russia https://www.britannica.com/list/timeline-of-world-war-i Apr 6, 1917 U.S declares war on Germany https://www.britannica.com/list/timeline-of-world-war-i May 16, 1917 Maria Bochkareva forms the Women's Battalion https://spartacus-educational.com/FWWchronology.htm May 29, 1917 Greece declares war on the Central Power https://spartacus-educational.com/FWWchronology.htm Jun 7, 1917 British attack on Messines https://spartacus-educational.com/FWWchronology.htm Nov 18, 1917 Sir Frederick Maude dies in Mesopotamia https://spartacus-educational.com/FWWchronology.htm Nov 20, 1917 Mass tank attack on Cambrai https://spartacus-educational.com/FWWchronology.htm May 25, 1918 German U-boats hit U.S water https://spartacus-educational.com/FWWchronology.htm Jun 28, 1918 Treaty of Versailles signed https://spartacus-educational.com/FWWchronology.htm Jul 4, 1918 Battle of Le Hamel https://spartacus-educational.com/FWWchronology.htm Jul 16, 1918 Tsar Nicholas and his family murdered by the Bolsheviks https://spartacus-educational.com/FWWchronology.htm Aug 8, 1918 Battle of Amiens begins https://spartacus-educational.com/FWWchronology.htm