World War I By sagross52 Jun 28, 1914 Franz Ferdinand assassinated Jul 28, 1914 Austria-Hungary declares war on Serbia Aug 1, 1914 Germany declares war on Russia Aug 3, 1914 Germany declares war on France Aug 4, 1914 Schlieffen Plan Aug 6, 1914 Austria-Hungary declares war on Russia and Serbia declares war on Germany Sep 5, 1914 Battle of Marne begins Oct 9, 1914 Battle of Ypres begins Feb 19, 1915 Dardanelles Campaign begins Apr 22, 1915 Second Battle of Ypres begins May 7, 1915 Lusitania is sunk by German U-boat Sep 5, 1915 Tsar Nicholas II takes full control over Russia's armies Feb 21, 1916 Battle of Verdun begins Longest battle of World War I and was one of the bloodiest Jul 1, 1916 Battle of Somme begins Jan 19, 1917 Zimmerman telegram sent to Mexico from Germany Apr 6, 1917 United States declares war on Germany Dec 17, 1917 Russia gets out of World War I with armistice with Central Powers Jan 8, 1918 President Woodrow Wilson issues his Fourteen Points Jul 15, 1918 Second Battle of Marne begins Nov 9, 1918 Kaiser Wilhelm flees Germany Nov 11, 1918 Germany signs armistice on the 11th hour of the 11th day of the 11th month ending WWI Jun 28, 1919 Treaty of Versailles officially ending World War I
