World War 1 By anijah4 Jun 28, 1914 Assassination of Archduke Ferdinand Assassination Jul 28, 1914 Austria- Hungary declares war on Serbia Austria declares war on Serbia Aug 4, 1914 Great Britain declares war on Germany Britain declares war on Germany Period: Aug 26, 1914 to Aug 30, 1914 Battle of Tanneburg Battle of Tanneburg Period: Sep 6, 1914 to Sep 10, 1914 First Battle of Marne Battle of Marne Oct 5, 1914 First German aircraft shot down by allied plane German aircraft Apr 22, 1915 German gas attack Gas Attack Oct 12, 1915 Edith Cavell executed Edith Cavell Period: Feb 21, 1916 to Dec 18, 1916 Battle of Verdun Battle of Verdun Apr 6, 1917 United States declares war on Germany U.S. declares war on Germany Period: Apr 9, 1917 to May 16, 1917 Battle of Arras Battle of Arras Period: Nov 20, 1917 to Dec 6, 1917 Battle of Cambrai Battle of Cambrai Nov 11, 1918 Armistice Day Armistice Day Jun 28, 1919 Treaty of Versailles Treaty of Versailles
