Thomas Bruce Millar AO (18 October 1925 – 5 June 1994), also known as T. B. Millar, was an Australian historian, political scientist and a major figure in the development of strategic studies in Australia. Millar was born in Kalamunda, Western Australia. He was educated at Guildford Grammar School in Perth and the Universities of Western Australia, Melbourne and London. He was a graduate of the Royal Military College, Duntroon, and served in the Australian Army in 1943–1950.