Timeline of World War I By shrimpe003 Jun 28, 1914 Archduke Francis Ferdinand is Assassinated Jul 28, 1914 Austria-Hungary declares War on Serbia Jul 29, 1914 Russia begans Mobilization ot protect Serbia Aug 1, 1914 Germany Declares War on Russia Aug 4, 1914 Great Britain joins War after Germnay invasion of Belgium Aug 4, 1914 President Wilson declares U.S. a nuetral nation Aug 29, 1914 Suffragists marched in NYC protesting for peace May 7, 1915 German U-Boat sink the Lusitania Mar 24, 1916 German U-Boat sink the Sussex Jan 31, 1917 Germany ends the Sussex Pledge that it had with with U.S. Feb 3, 1917 United States cuts Diplomatic ties with Germany Period: Mar 16, 1917 to Mar 18, 1917 Germany U-Boats sink 3 United States Ships The Memphis, Illinois, Vigilancia Period: Apr 1, 1917 to Apr 30, 1917 Germany Sinks more than 400 Allied and nuetral ships in this Month Apr 6, 1917 America joins the War Jan 8, 1918 Wilson shared his 14 Point Plan with Congress Mar 3, 1918 Lenin Bolshevik signs a final peace treaty with Germany and Russia leaves the War Mar 21, 1918 German forces attack British Lines nad sucessfully broke through the trenches May 28, 1918 American Soldiers recaptured the Village of Cantigny Aug 8, 1918 Battle of Amiens The Allied Army stopped the German advance in the North and recaptured Germnay's gains form earlier in the year Sep 26, 1918 Meuse-Argonne Offensive began Oct 29, 1918 German Soldiers Mutinied pressuring the German Generals to End the War Nov 10, 1918 Kaiser flees to Holland Nov 11, 1918 Armistice is called for May 7, 1919 Allies Present the treaty of Versailles to Germany, Germany refuses Jun 28, 1919 Germany accepts the Treaty of Versailles after threat of Invasion Jul 8, 1919 Wilson returns to the U.S. after the treaty is accepted May 20, 1920 Congress votes to disregard the Treaty of Versailles and they declare the War officially over