World war one By Jack#7 Jun 28, 1914 Austrian Archduke francis ferdinand assassinated Jul 19, 1914 Council of Austro-Hungarian Ministers approve of draft ultimatum to Serbia Jan 15, 1915 Existence of secret agreement for mutual support between Italy and Rumania announced by respective Governments. Sep 7, 1915 First battle of The Marne Feb 23, 1916 Portugal seizes German steamers in the Tagus Apr 29, 1916 Surrender of British troops at the siege of kut in Mesopotamia. Jan 11, 1917 Settlement Treaty signed at Berlin between Germany and Turkey Apr 2, 1917 Untied states congress declares war on Germany. Mar 14, 1918 Congress of Soviets meet at Moscow to ratify treaty of peace with Central Powers Aug 8, 1918 Hundred days offensive begin. Jan 11, 1919 The treaty of versailies is signed, the league of nations is created. Feb 24, 1919 The Allies secretly agree to military intervention in the Russian Civil War. Feb 27, 1920 Federal agents break into the homes and meeting places of thousands of suspected revolutionaries in the thirty-three cities. Mar 24, 1921 Washington Conference for Naval Disarmament was convened by the US, and Japan was invited to attend Period: Mar 20, 2017 to Mar 21, 2017 Sources 1.http://www.history.com/topics/world-war-i/world-war-i-history 2.https://www.marxists.org/glossary/events/w/ww1/russia.htm 3.https://www3.dbu.edu/mitchell/ww!keyevents.htm