ww1 timeline By Bwc9765 Jun 28, 1914 Archduke Archduke Ferdinand is assassinated. Jun 28, 1914 Germany declares war Germany declares war on France and Russia. Apr 6, 1917 USA enters war United states enters war Dec 2, 1917 russia war russia left the war Nov 14, 1918 Ottoman empire ottoman empire declares war on the allies. Jan 18, 1919 treaty the Paris peace conference.