The Battle of the Somme (, ), also known as the Somme Offensive, was a battle of the First World War fought by the armies of the British and French empires against the German Empire. It took place between 1 July and 18 November 1916 on both sides of the River Somme in France. It was one of the largest battles of World War I, in which more than were wounded or killed, making it one of the bloodiest battles in human history. A Franco-British commitment to an offensive on the Somme had been made during Allied discussions at Chantilly, Oise, in December 1915. The Allies agreed upon a strategy of combined offensives against the Central Powers in 1916, by the French, Russian, British, and Italian armies, with the Somme offensive as the Franco-British contribution. The main part of the offensive was to be made by the French Army, supported on the northern flank by the Fourth Army of the British Expeditionary Force (BEF).