ww1 By NICK NICK NICK NICK NICK NICK NICK Jun 28, 1914 heir to the Austrian throne killed Believing the Austrians target their anger toward Serbia. heir to the Austrian throne killed Believing the assassin to be a Serbian nationalist, the Austrians target their anger toward Serbia. Archduke Franz Ferdinand this was when it all standing Aug 4, 1914 n May 7, 1915 5/7/1915 Nov 19, 1916 11/7/1916 Jan 19, 1917 1/19/1917