WW1 Timeline By roro123456 Jun 28, 1914 The assassination of Archduke Franz Ferdinand Assassinated by Serbian nationalist Gavrilo Princip while visiting Sarajevo. Period: Jun 28, 1914 to Jun 28, 1919 Timespan of WW1 Aug 4, 1914 Germany declars war on Russia May 7, 1915 Sinking of the British ship, Lusitania Nov 7, 1916 Woodrow Wilson gets re-elected as President Jan 19, 1917 Zimmerman Note Germany sends the secret Zimmerman Telegram to Mexico in an effort to entice Mexico to join the war. Apr 6, 1917 The U.S. declares war on Germany May 18, 1917 The Selective Service Act becomes law May 16, 1918 Congress Passes the Sedition Act Jun 28, 1919 The Treaty of Versailles officially ends WW1 Jan 10, 1920 Wilson established the League of Nations
