Timeline History By Lemonono Period: Jan 1, 1830 to Jun 27, 1914 Pre-WW1 Apr 19, 1839 London Treaty 1871 German Empire is Founded 1879 Dual alliance treaty 1882 Italy Joins the Alliance 1887 Germany signs the Reinsurance treaty 1892 The Franco-Russian military convention 1904 Agreements between Britain and France 1907 Agreements between Britain and Russia Jun 28, 1914 Assasination of Archduke Franz Ferdinand Period: Jun 28, 1914 to Nov 11, 1918 WW1 Jul 28, 1914 Austria-Hungary declares war on Serbia Aug 1, 1914 Germany declares war on Russia Aug 3, 1914 Germany declares war on France Aug 6, 1914 Austria-Hungary declares war on Russia Aug 7, 1914 The Schlieffen Plan Aug 16, 1914 Battle of Tannenberg Aug 23, 1914 Japan declares war on Germany Sep 5, 1914 First battle of Marne Dec 25, 1914 Christmas Truce 1915 Battle of Gallipoli May 7, 1915 Sinking of the Lusitania Feb 21, 1916 Battle of Verdun Jul 1, 1916 Battle of Somme Feb 3, 1917 United States severs diplomatic relations with Germany. Apr 6, 1917 The US declares war on Germany Jul 31, 1917 Battle of Passchendaele Nov 11, 1918 End Of War / Armistice is Signed Period: Nov 12, 1918 to Jan 1, 1925 Post-WW1 Jan 18, 1919 Paris Peace Conference Jun 28, 1919 Treaty of Versailles Sep 10, 1919 Treaty of Saint-Germain Nov 27, 1919 Treaty of Neuilly Jun 4, 1920 Treaty of Trianon Aug 10, 1920 Treaty of Serves