later. He was placed in charge of RAAF Station Laverton, Victoria, including No. 1 Aircraft Depot, in February 1933. McNamara was raised to group captain in 1936, and attended the Imperial Defence College, London, the following year. He was appointed a Commander of the Order of the British Empire (CBE) in the 1938 New Year Honours. World War II When World War II broke out in September 1939, McNamara was serving as Air Liaison Officer at Australia House in London, a position he had held since January 1938. Shortly before being promoted air commodore in December, he advocated establishing a reception base to act as a headquarters for the RAAF in England and "generally to watch the interests of Australian personnel" who were stationed there. By November 1940 he had reversed his position, in favour of an Air Ministry proposal to process personnel of all nationalities in one RAF base camp. In the event, RAAF Overseas Headquarters was formed on 1 December 1941; Air Marshal Richard Williams was appointed Air Officer Commanding (AOC) and McNamara Deputy AOC. McNamara became acting air vice marshal and acting AOC of RAAF Overseas Headquarters when Williams returned to Australia in January 1942 for what was expected to be a temporary visit; Williams was subsequently posted to Washington, D.C. and McNamara retained command of the headquarters until the end of the year. McNamara was appointed AOC British Forces Aden in late 1942, and arrived to take up the posting on 9 January 1943. Described in the official history of Australia in the war as a "backwater", British Forces Aden's main functions were conducting anti-submarine patrols and escorting convoys. McNamara flew on these missions whenever he could, generally as an observer, but enemy contact was rare. He was appointed a Companion of the Order of the Bath (CB) in the 1945 New Year Honours, and returned to London in March. That month McNamara was deeply affected by the loss of his close friend Peter Drummond, who had helped keep attacking cavalry at bay during his Victoria Cross action in 1917. Drummond's Consolidated B-24 Liberator disappeared near the Azores en route to Canada and all aboard were presumed killed; McNamara had to break the news to his widow, Isabel. McNamara's health had also suffered from exposure to the desert dust in Aden, and he was unable to take up his next position as the RAAF's representative at