AP 25 By Bayne Y 1914 Ottoman Empire joins the Central powers Jun 28, 1914 Serbian nationalist assassinate Archduke Franz Ferdinand Period: Jul 28, 1914 to Nov 11, 1918 WW1 Period: Sep 5, 1914 to Sep 12, 1914 1st Battle of the Marne 1915 Italy joins the Triple Entente Period: 1915 to 1923 Armenian Genocide Period: Feb 19, 1915 to Jan 9, 1916 Battle of Gallipoli Period: Apr 22, 1915 to May 25, 1915 2nd Battle of Ypres Apr 25, 1915 Allie invade Turkey May 7, 1915 German submarine sinks the Lusitania 1916 Sussex Pledge Period: Feb 21, 1916 to Dec 18, 1916 Battles of Verdun and the Somme Jun 10, 1916 Arab rebellion against Ottoman Empire 1917 Balfour Declaration on the Jewish homeland in Palestine Period: Mar 8, 1917 to Jun 16, 1923 Bolshevik Revolution in Russia Period: Mar 8, 1917 to Mar 12, 1917 February Revolution in Russia Apr 4, 1917 US enters the war Period: Oct 24, 1917 to Nov 19, 1917 Battle of Caporetto Period: Nov 7, 1917 to Oct 25, 1922 Civil War in Russia 1918 Revolution in Germany Mar 3, 1918 Treaty of Brest-Litovsk Jun 28, 1919 Treaty of Versailles Oct 11, 1922 Treaty of Lausanne recognizes Turkish independence