WW1 By Countrygirl22 Aug 1, 1914 Germany declares war on Russia Aug 4, 1914 Britian declares war on Germany Sep 6, 1914 Battle of the Marne started Feb 19, 1915 Britain bombarded Turkish forts in the Dardanelles May 23, 1915 Italy declared war on Germany and Austria Aug 15, 1915 The Germans captured Warsaw from the Russians Feb 21, 1916 Start of the Battle of Verdun Apr 6, 1917 USA declared war on Germany Dec 5, 1917 Armistice between Germany and Russia signed Mar 21, 1918 Germany broke through on the Somme