The Conservatives won the general election in October 1951 with an overall majority of 17 seats and Churchill again became Prime Minister, remaining in office until his resignation on 5 April 1955. Eden, his eventual successor, was restored to Foreign Affairs, the portfolio with which Churchill was preoccupied throughout his tenure. Future Prime Minister Harold Macmillan was appointed Minister of Housing and Local Government with a manifesto commitment to build 300,000 new houses per annum, Churchill's only real domestic concern. He achieved the target and, in October 1954, was promoted to Minister of Defence.