World War 1 By vontarius69 Jun 28, 1914 Assassination of Archduke Ferdinand Archduke Ferdinand Aug 1, 1914 Germany declares war on Russia Germany declares War against Russia Aug 1, 1914 Great Britain declares war on Germany Great Britain declares war Aug 6, 1914 Austria-Hungary declares war on Serbia Austria-Hungary declares War Sep 6, 1914 First Battle of the Mane First Battle of the Marne Oct 19, 1914 First Battle of Ypres First Battle of Ypres Feb 1, 1915 Submarines Back Submarines Back Apr 22, 1915 German Fire German Fire May 7, 1915 Lusitania Sinks Lusitania Sinks Jul 1, 1916 Battle of the Somme [The Battle of Somme][https://www.history.com/topics/world-war-i/battle-of-the-somme] Apr 9, 1917 Battle of the Vimy Ridge Battle of Vimy Ridge Jul 31, 1917 Battle of the Passchendaele Battle of Passchendaele Nov 11, 1918 Armistice Day Armistice Day Jun 28, 1919 Treaty of Versailles [Signing of the Treaty of Versailles (https://www.history.com/topics/world-war-i/treaty-of-versailles-1)
