Sir Anthony Eden (1897-1977) was Foreign Secretary under Chamberlain. It is thought by some that he resigned his office, objecting to Chamberlain's policy of appeasement, although others claim that he was forced out. When Churchill became Prime Minister, he was brought back into the cabinet as Secretary of State for War; Churchill held him in high regard. Eden was responsible for the introduction of the Home Guard.
When Churchill resigned in 1955, Eden took over as Prime Minister. His time in office was marred by the Suez Crisis of 1956, when the UN and USA forced Britain and France to pull back from their invasion of Egypt and give up control of the Suez Canal. He resigned in 1957 and left the House of Commons soon afterwards. He was succeeded by Harold Macmillan.