(1890–1968), British Army officer who served as chief (‘C’) of the British Secret Intelligence Service, MI6, from November 1939 to 1952. Although he had his detractors, most authorities praise his wartime success in expanding and maintaining a diverse empire that included MI6, the government Code and Cypher School at Bletchley Park, MI6's Radio Security Service, and the communications network of Special Liaison Units (SLU) which were responsible for delivering ULTRA intelligence to commanders in the field. Though he had not been Churchill's candidate to succeed Admiral Hugh Sinclair as ‘C’—he achieved the post through the backing of Lord Halifax—Menzies's success was only possible because of his close relationship with the prime minister, which was resented by other directors of intelligence.
From The Oxford Companion to World War II in Oxford Reference.
Subjects: Second World War.