WWI Entries to the War By 444030 Jun 28, 1914 Serbian Nationalist Assassinated Archduke Ferdinand A Serbian Nationalist Murders Archduke Ferdinand. Jul 28, 1914 Austria-Hungarry Declares War on Serbia Jul 31, 1914 Russia mobilized its armed forces Aug 1, 1914 Germany declares war on Russia Aug 3, 1914 Germany declares war on France Aug 4, 1914 Great Britain declares war on Germany May 7, 1915 German U-Boat sinks British Passenger Liner A German U-Boat sinks British Passenger Liner killing 1,200 people 128 of them American. Feb 24, 1917 President Wilson was Shown the Zimmerman Telegrapm Mar 1, 1917 The Tsar was Overthrown Mar 31, 1917 Russian military defeats and food shortages led to an uprising Apr 2, 1917 President Wilson asks congress to declare war
