World War 1 By lavond Jun 25, 1914 Austria declares war on Japan. Austria declares war on Japan. Jun 28, 1914 Assassination of Archduke Ferdinand Archduke Ferdinand Jul 28, 1914 Austria-Hungary declares war on Serbia. Austria-Hungary declares war on Serbia. Aug 4, 1914 Britain declares war on Germany. Britain declares war on Germany. Aug 4, 1914 German troops enter Belgium German troops enter Belgium Aug 26, 1914 Battle of Tannenberg Battle of Tannenberg Sep 2, 1914 War Propaganda Bureau Writers Conference War Propaganda Bureau Writers Conference Sep 6, 1914 First Battle of Marne First Battle of Marne Oct 5, 1914 First German aircraft shot down by Allied plane First German aircraft shot down by Allied plane Period: Feb 19, 1915 to Jan 9, 1916 Battle of Gallipoli Battle of Gallipoli May 31, 1915 Battle of Jutland Battle of Jutland Period: Feb 21, 1916 to Dec 19, 1916 Battle of Verdun Battle of Verdun Nov 11, 1918 Armistice Day Armistice Day Jun 28, 1919 Treaty of Versailles Treaty of Versailles
