WW1 By s874058 Jun 28, 1914 Assassination of Archduke Ferdinand Archduke Ferdinand was Assassinated Jul 24, 1914 Serbia Appeals Serbia Appeals to Russia for help Aug 4, 1914 German Troops Enter Belgium (https://spartacus-educational.com/FWWbelgiumIN.htm_ Aug 12, 1914 Invasion of Serbia (https://spartacus-educational.com/FWWbalkan.htm) Period: Feb 19, 1915 to Jan 9, 1916 Gallipoli Campaign Gallipoli Period: Feb 21, 1916 to Dec 18, 1916 Battle of Verdun Verdun Period: Apr 1, 1916 to Nov 18, 1816 Battle of the Somme Somme Period: Sep 6, 1916 to Sep 10, 1916 First Battle of the Marne Marne Jul 6, 1917 US Declares War on the German Empire War on the German Empire Jul 28, 1917 Austria-Hungary Declares War on Serbia [Austria War on Serbia] Dec 7, 1917 US Declares Wars on Austria-Hungary [War on Austria-Hungary (https://www.centenarynews.com/article/the-us-declares-war-on-austria-hungary-7-december-1917) Period: Mar 21, 1918 to Apr 18, 1918 Spring Offensive Spring Offensive Nov 11, 1918 Armistice Day Armistice Day Period: Jun 28, 1919 to May 21, 2020 Treaty of Versailles signing of the treaty
