Major General Arthur Samuel "Tubby" Allen, (10 March 1894 – 25 January 1959) was an Australian Army officer and accountant. During the Second World War he reached the rank of major general and commanded Allied forces in the Syria–Lebanon and New Guinea campaigns. Allen was frequently referred to during the Second World War by the nickname "Tubby"; an indication of his stocky build and the affection with which he was regarded by both soldiers and the Australian public.