During the First World War the 3rd Division was a permanently established Regular Army division that was amongst the first to be sent to France at the outbreak of the war as part of the British Expeditionary Force (BEF). The 3rd Division served on the Western Front in France and Belgium for four years, from 1914 to 1918. During this time, it was nicknamed "The Iron Division". Its first commander during the war, Major-General Hubert Hamilton, was killed by shellfire near Béthune in October 1914. The division served in many major battles of the war, including the Battle of Mons and the subsequent Great Retreat, and later the First Battle of Ypres.