World War I By Wthomas21 Jun 28, 1914 Archduke Franz Ferdinand Archduke Franz Ferdinand is assassinated by Gavrilo Princip Period: Jun 28, 1914 to Jul 2, 1921 World War 1 Jul 14, 1914 Austria-Hungary declares war on Serbia Aug 1, 1914 Germany declares war on Russia Aug 4, 1914 Great Britain Joins the war as does France Period: Sep 14, 1914 to Sep 2, 1917 STALEMATE (Trench Warfare) May 7, 1915 Lusitania sinking Mar 24, 1916 Germany Torpedoed the Sussex, a French liner. Jan 31, 1917 Germany ends the Sussex pledge Feb 3, 1917 US ends diplomatic relations with Germany Mar 1, 1917 The Russian Revolution when the government was overthrown Mar 16, 1917 The sinking of the City of Memphis, Vigilanicia, and Illinois May 1, 1917 The US issued the Selective Service act to get troops Sep 1, 1917 STALEMATE (Trench Warfare) Mar 3, 1918 The Russian Government is overthrown again and they sign a treaty with Germany Mar 21, 1918 German forces attack the British in France Jan 8, 1919 Wilson initiates the fourteen points and they are declined except the League of Nationa May 7, 1919 The treaty of Versailles is signed by France and Great Britain, but not the US Jul 2, 1921 The US signs their own seperate treaty with Germany