Edward Heath served in World War II as an artillery officer. In 1950, he was elected to Parliament where he served as the Conservative Party whip from 1955 to 1959. Heath entered the Cabinet in 1963 as Minister for Trade and Industry. In 1965, he became the head of the Conservative Party and in 1970, he became Prime Minster. His greatest accomplishment was leading Great Britain into membership in the Common Market. A labor crisis in 1974 resulted in the Conservatives losing the elections. Bibliography: Van Thal, Herbert. The Prime Ministers : From Sir Robert Walpole to Edward Heath. 1975. Stein &Day Pub. Heath,Edwards.Sailing: A Course of My Life.1976.Stein & Day Pub.