 After the war Macmillan joined his family business, then entered Parliament at the 1924 general election for the northern industrial constituency of Stockton-on-Tees.After losing his seat in 1929, he regained it in 1931, soon after which he spoke out against the high rate of unemployment in Stockton-on-Tees, and against appeasement.Rising to high office during the Second World War as a protégé of wartime Prime Minister Winston Churchill, Macmillan then served as Foreign Secretary and Chancellor of the Exchequer under Churchill's successor Sir Anthony Eden.