Timeline of WWI Ms. Flowers' class By Ratchford Jun 28, 1914 Death of Franz Ferdinand Archduke Franz Ferdinand of Austria-Hungary is assassinated in Sarajevo. This begins to turn the wheels of war. Jul 28, 1914 Russia Sends troops into Serbia. Feb 4, 1915 Germany begins submarine warfare on merchant vessels Aug 17, 1915 Great Russian Retreat begins Period: Oct 7, 1915 to Dec 4, 1915 Germany invades Serbia Feb 21, 1916 Battle of Verdun begins Jul 1, 1916 Battle of The Somme begins Aug 27, 1916 Italy declares war on Germany Aug 29, 1916 Paul von Hindenburg becomes German Chief of Staff Nov 18, 1916 Battle of the Somme ends in a draw Jan 16, 1917 Zimmermann Telegram intercepted by allies Apr 6, 1917 US declares war on Germany Nov 7, 1917 Bolshevik Revolution begins in Russia Dec 23, 1917 Russian armistice with Germany Period: Sep 18, 1918 to Oct 17, 1918 Allies break throught the Hindenberg line and push towards Germany Sep 26, 1918 Meuse-Argonne Offensive begins Nov 9, 1918 Kaiser William II abdicates and a Republic is proclaimed in Germany. Nov 10, 1918 Austro-Hungarian Kaiser Charles I abdicates Nov 27, 1918 Germany evacuates Belgium Jun 29, 1919 Treaty of Versailles is signed, ending The Great War Jan 10, 1920 First meeting of the League of Nations officially ended war