Field Marshal Douglas Haig, 1st Earl Haig, (19 June 1861 – 29 January 1928) was a senior officer of the British Army. During the First World War he commanded the British Expeditionary Force (BEF) on the Western Front from late 1915 until the end of the war.
Haig's military career included service in the War Office, where he was instrumental in the creation of the Territorial Force in 1908. In January 1917 he was promoted to the rank of field marshal, subsequently leading the BEF during the final Hundred Days Offensive. This campaign, in combination with the Kiel mutiny, the Wilhelmshaven mutiny, the proclamation of a republic on 9 November 1918 and revolution across Germany, led to the armistice of 11 November 1918. It is considered by some historians to be one of the greatest victories ever achieved by a British-led army.
Haig gained a favourable reputation during the immediate post-war years, with his funeral a day of national mourning. However he also had some prominent contemporary detractors and, beginning in the 1960s, has been widely criticised for his wartime leadership. He was nicknamed "Butcher Haig" for the two million British casualties under his command.