World War I By facebooker_2003984233055781 Jun 28, 1914 Archduke Francis Ferdinand is assassinated. Jul 28, 1914 Austria-Hungary declares war on Serbia, beginning World War I. Sep 9, 1914 Allied forces halt German advance into France during First Battle of the Marne. May 7, 1915 German submarine sinks the passenger liner Lusitania During crossing from New York to Liverpool, England, killing 128 Americans. Dec 18, 1916 Battle of Verdun ends with 550,000 French and 450,000 German casualties. Apr 6, 1917 The United States declares war on Germany. Jan 8, 1918 President Woodrow Wilson presents to Congress his outline of Fourteen Points required for peace. May 28, 1918 United States forces are victorious in the Battle of Cantigny, the first independent American operation. Jan 18, 1919 Peace conference begins at Paris. Feb 14, 1919 Draft of the covenant of the League of Nations is completed. Jan 10, 1920 Treaty of Versailles takes effect. Aug 24, 1921 United States signs separate peace treaties with Germany, Austria, and Hungary.
