Field Marshal Sir Alan Francis Brooke, 1st Viscount Alanbrooke, KG, GCB, OM, GCVO, DSO & Bar (23 July 1883  17 June 1963), was a senior commander in the British Army. He was the Chief of the Imperial General Staff during the Second World War, and was promoted to field marshal in 1944. As chairman of the Chiefs of Staff Committee, Brooke was the foremost military advisor to Prime Minister Winston Churchill, and in the role of co-ordinator of the British military efforts was an extremely important but not always well-known contributor to the Allies' victory in 1945. After retiring from the army, he served as Lord High Constable of England during the Coronation of Queen Elizabeth II in 1953. His war diaries attracted attention for their criticism of Churchill and for Brooke's forthright views on other leading figures of the war.