World War 1 By $C30 May 20, 1882 Formation of the Triple Alliance Aug 31, 1907 Formation of the Triple Entente Feb 4, 1914 Germany Declares a Blockade on Britain Jun 1, 1914 First Use of Submarines Jun 28, 1914 Assassination of Franz Ferdinand Aug 4, 1914 Beginning of Schlieffen Plan Aug 20, 1914 First Use of Poison Gas Aug 26, 1914 Battle of Tannenberg Sep 6, 1914 Battle of Marne Trench Warfare and Stalemate Begins Oct 19, 1914 Battle of Ypres Nov 3, 1914 Britain Declares a Blockade on Germany Jan 19, 1915 First German Zeppelin Attack Feb 1, 1915 First Use of Tanks Mar 18, 1915 Dardanelles Campaign Apr 30, 1915 Creation of Yugoslavia May 7, 1915 Sinking of the Lusitania Feb 21, 1916 Battle of Verdun May 4, 1916 Germans Break the Sussex Pledge Jul 1, 1916 Battle of Somme Jan 19, 1917 Zimmerman Telegram Mar 15, 1917 Czar Nicholas II Abdicates the Throne Apr 2, 1917 U.S. Declares War on Germany Nov 7, 1917 Bolshevik Revolution is Successful Period: Jan 1, 1918 to Jan 1, 1919 Flu Epidemic Jan 8, 1918 Fourteen Points Mar 3, 1918 Treaty of Brest-Litovsk Jul 15, 1918 2nd Battle of Marne Sep 12, 1918 General Jack Pershing Leads the American Expeditionary Force in the First Major Offensive in Europe Oct 28, 1918 Creation of Czechoslovakia Nov 5, 1918 Creation of the Mandate System Nov 9, 1918 Kaiser Wilhelm II Abdicates the Throne Nov 11, 1918 Armistice Day 11th hour of the 11th day of the 11th month Jun 28, 1919 Treaty of Versailles Jan 10, 1920 Creation of the League of Nations
