WWI By cameron10 Apr 5, 1882 Triple Alliance forms Apr 5, 1907 Triple Entente forms Jun 28, 1914 Archduke Assassination Jul 28, 1914 Austria declares war on Serbia Jul 28, 1914 World War I began Mar 21, 1915 Germany starts war with Belgium May 7, 1915 The Lusitania Sinks Jun 11, 1915 Lusitania sunk by German forces Sep 26, 1915 Allied forces launch final offensive into Western Font Apr 5, 1916 Battle of Verdun Apr 5, 1916 Rasputin assassinated Mar 8, 1917 Czar Nicholas II steps down Apr 5, 1917 United States enters the war Apr 5, 1918 Lenin signs Treaty of Brest-Litovsky Jun 1, 1918 Germany agrees to an armistice Apr 5, 1919 Treaty of Versailles sighned at the Paris Peace Conference Apr 5, 1921 Communist control Russia