World Events from 1910-1919 By buddyman1111 Jan 1, 1910 Boy Scouts Established in U.S. Aug 21, 1911 Mona Lisa Stolen Apr 15, 1912 The Titanic Sinks Apr 15, 1913 Personal Income Tax Introduced in U.S. Jul 28, 1914 World War I Begins Apr 24, 1915 Armenian Genocide Feb 21, 1916 Battle of Verdun Apr 6, 1917 U.S. Enters World War I Jul 17, 1918 Russian Czar Nicholas II and His Family are Killed Jun 28, 1919 Treaty of Versailles Ends World War I