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Franz Ferdinand and his wife were assassinated in Sarajevo, the capital of the Austro-Hungarian province of Bosnia and Herzegovina. -
Germany invaded Belgium to avoid French fortifications along the French-German border. -
The First Battle of the Marne or known in France as the Miracle on the Marne -
The Battle of Gallipoli was part of World War I and was fought to force Turkey out of the war and to capture Constantinople -
The French repelled the German assault and saved the city of Verdun -
The Battle of the Somme was one of the most bitterly contested and costly battles of the First World War, lasting nearly five months. -
Gregory Rasputin, the holy man who had become a favourite of Tsar Nicholas II and the Tsarina Alexandra because of their belief in his healing powers -
Discontent at home, plus losses of territory and massive casualties in two wars, precipitated the February Revolution on March 12, 1917. Nicholas II abdicated on March 15, 1917 -
President Woodrow Wilson asked a special joint session of the United States Congress for a declaration of war on April 2, 1917, which passed in the Senate on the same day and then in the House of Representatives four days later on April 6. -
Vladimir Lenin, leader of the revolutionary Bolshevik Party, returns to Petrograd after a decade of exile -
The Treaty of Brest-Litovsk was a peace treaty signed on March 3, 1918, between the new Bolshevik government of Soviet Russia and the Central Powers -
On Nov. 11, 1918, after more than four years of horrific fighting and the loss of millions of lives, the guns on the Western Front fell silent. -
The Treaty of Versailles was signed by Germany and the Allied Nations on June 28, 1919, formally ending World War One.