World War 1 By Makenzimccotter Jun 28, 1914 Archduke Francis Ferdinand is assassinated Jul 28, 1914 Austria-Hungary declares war on Serbia, beginning World War I. Aug 2, 1914 A secret alliance was signed between Germany and the Ottoman Empire. German troops occupied Luxembourg in accordance with its Schlieffen Plan. Aug 7, 1914 The first British troops land in France Aug 10, 1914 Austria-Hungary invades Russia. Sep 10, 1914 Allied forces halt German advance into France during First Battle of the Marne. Feb 18, 1915 Germany begins naval blockade of Great Britain. Apr 25, 1915 Allied forces land on the Gallipoli Peninsula of the Ottoman Empire May 7, 1915 German submarine sinks the passenger liner Lusitania during crossing from New York to Liverpool, England, killing 128 Americans. May 23, 1915 Italy declares war on Austria-Hungary Feb 21, 1916 Germany begins the attack on Verdun. May 31, 1916 Naval Battle of Jutland takes place between British and German fleets. Jul 1, 1916 Allied offensive begins the Battle of the Somme Dec 18, 1916 Battle of Verdun ends with 550,000 French and 450,000 German casualties. Feb 1, 1917 Germany returns to unrestricted submarine warfare halted after the sinking of the Lusitania. Feb 3, 1917 United States severs diplomatic relations with Germany. Apr 6, 1917 The United States declares war on Germany. Jun 7, 1917 General John J. Pershing, newly selected commander of the American Expeditionary Forces, arrives in England with his staff Jun 24, 1917 American combat forces arrive in France. Dec 15, 1917 Russia signs armistice with Germany. Jan 8, 1918 President Woodrow Wilson presents to Congress his outline of Fourteen Points required for peace. Mar 21, 1918 Germany begins its final offensive of the war. May 28, 1918 United States forces are victorious in the Battle of Cantigny, the first independent American operation. Jun 2, 1918 American forces stop German attempt to cross the Marne River at Chateau-Thierry. Sep 12, 1918 American First Army attacks St. Mihiel salient. Dec 1, 1918 British and American forces enter Germany. Jan 18, 1919 Peace conference begins at Paris. Jan 10, 1920 Treaty of Versailles takes effect. Aug 29, 1921 United States signs separate peace treaties with Germany, Austria, and Hungary.