U.S Involvement in WW1 By facebooker_1207184592637691 Apr 6, 1914 Women start up in the work force. May 7, 1915 The sinking Lusitania is caused by German U-boats. Mar 24, 1916 Sinking of Sussex. Jan 6, 1917 Germany invades Russia Jan 9, 1917 Now starts unrestricted submarine warfare. Jan 22, 1917 Woodrow Wilson gives his "Peace Without Victory" speech. Feb 3, 1917 U.S cuts ties with Germany. Mar 1, 1917 The Zimmerman telegram between Germany and Mexico. Mar 4, 1917 President Woodrow Wilson starts his 2nd term. Apr 6, 1917 The U.S enters the war/ a declaration of war is made. Apr 6, 1917 U.S joins the Allies. May 18, 1917 The Selective Service Act starts up. Jan 8, 1918 Woodrow Wilson makes his 14 points. Nov 11, 1918 End of WW1. Jun 28, 1919 Treaty of Versailles. Jan 16, 1920 First meeting held by the League of Nations on this day.