Jun 28, 1914. Archduke Assassination. Archduke Franz Ferdinand is assassinated in Sarajevo. ...
Jul 30, 1914. Russia Mobilizes. ...
Aug 4, 1914. World War I Begins. ...
Apr 22, 1915. Germans Fire. ...
May 7, 1915. Lusitania Sinks. ...
Sep 18, 1915. Germany Limits Submarines. ...
Sep 15, 1916. First Tanks. ...
Feb 1, 1917. Submarines Back.