, Point Cook, |alt=Portrait of moustachioed man in dark military uniform with pilot's wings on left pocket Among a small coterie of wartime RAAF commanders considered suitable for future senior roles, Hancock retained his rank of group captain following the end of hostilities. As Director of Personnel Services during 1946, he was involved in restructuring the Air Force into a dramatically smaller peacetime service. He recalled it as a "twilight period" when "no-one wanted to know about us" and many good people were let go due to the government's parsimonious retention policies. On 1 January 1947, Hancock was promoted to substantive group captain. Receiving a further promotion to temporary
air commodore on 1 March, he was appointed inaugural commandant of the newly formed
RAAF College, Point Cook, the Air Force's equivalent of Duntroon and the
Royal Australian Naval College. He also drafted the institution's charter. Departing in late 1949, he spent the following year in Britain, where he attended the
Imperial Defence College, receiving a promotion to substantive air commodore on 1 February 1950. On his return to Australia in 1951, he was promoted to acting
air vice-marshal and made
Deputy Chief of the Air Staff on 21 June. He was raised to a
Commander of the Order of the British Empire (CBE) in the 1953
New Years Honours. On 16 October that year, Hancock took over from Air Vice-Marshal
Frank Bladin as Air Member for Personnel (AMP), and was promoted substantive air vice-marshal on 1 January 1954. As AMP, he occupied a seat on the
Air Board, the service's controlling body that consisted of its most senior officers and which was chaired by the Chief of the Air Staff. Completing his term on 3 January 1955, Hancock was posted to Britain as Head of the Australian Joint Services Staff in London. In March 1957, Hancock was one of three candidates, along with Air Vice-Marshals
Frederick Scherger and
Allan Walters, touted as possible successors to Air Marshal
Sir John McCauley as Chief of the Air Staff (CAS), the RAAF's senior position. Scherger gained selection, and Hancock was posted in June to
Malaya as
Air Officer Commanding (AOC)
No. 224 Group RAF, responsible for all Commonwealth air forces in the region. According to the official post-war history of the RAAF, though fastidious in appearance and a strict
teetotaller, Hancock was known for his enthusiasm in meeting staff and as "an indefatigable participant in mess functions and games". He also made a point of getting out to units in the field, taking every opportunity to fly himself around his command. He returned to Australia in July 1959 to serve as AOC Operational Command (now
Air Command). In June, he met with his
opposite numbers in the Army and
Navy at a Chiefs of Staff Committee conference to discuss the necessity of Australia's acquiring nuclear weapons; the chiefs agreed that the probability such a capability would be required was remote but that it should remain an option under certain circumstances, a position the defence forces maintained during the ensuing decade. He was appointed a
Knight Commander of the Order of the British Empire (KBE) in the 1962 Queen's Birthday Honours,
gazetted on 2June. in
Malta, where the unit was on garrison duty, August 1953|alt=Two men in light-coloured military uniforms with peaked caps, shaking hands in front of a row of similarly dressed men As CAS, Hancock worked to enhance the RAAF's deterrent capability in the Pacific region, particularly in light of heightened tensions with Indonesia during its period of
Konfrontasi with Malaysia. In June 1963, Hancock undertook a mission to Britain, France and the United States to consider potential replacements for the
English Electric Canberra bomber as Australia's prime aerial strike platform. After investigating the US
"TFX",
North American A-5 Vigilante and
McDonnell Douglas F-4 Phantom II, the British
BAC TSR-2, and the French
Dassault Mirage IV, Hancock decided the swing-wing TFX, forerunner of the General Dynamics F-111, would be the aircraft best suited for this role. As the TFX had not yet flown, he recommended purchase of the already operational Vigilante to counteract a perceived imminent threat from Indonesia. In the event, the Federal Government did not go ahead with an immediate replacement for the Canberra, and Hancock's original choice of the TFX was taken up as a long-term solution, leading to Australia's agreement in October to purchase the
F-111C. The same month, as
Konfrontasi continued to simmer, Hancock approved simplification to the rules of engagement for Australian
CAC Sabre fighters based at
RAAF Butterworth to engage and destroy Indonesian aircraft violating Malay air space. The following month he urged using RAAF Canberras from Butterworth to make pre-emptive strikes against Indonesian air bases, in retaliation for incursions into West Malaysia, but Britain, which had initially requested Australia's involvement, held back on action. Once the F-111 had been ordered, Hancock sought a suitable forward airfield from which they could operate. In this, he continued a policy initiated by his predecessor as CAS, Air Marshal Scherger, of developing a chain of so-called "
bare bases" in Northern Australia. Hancock recommended redeveloping
RAAF Base Learmonth in the northern part of Western Australia, due to its proximity to Indonesia. Flying out of this airfield, the F-111s could destroy "vital centres in
Java"; just as importantly for deterrence purposes, Hancock contended, enhancing the base's capability would send a clear message to Indonesia's hierarchy. Though the project was delayed, in part due to thawing in relations between Australia and Indonesia, Learmonth's upgrade was completed in 1973, the same year the F-111 finally entered RAAF service. The latter part of Hancock's tour as CAS coincided with the beginning of large-scale
Australian involvement in the Vietnam War. By mid-1964, the Commonwealth had already sent a small team of military advisors, plus a detachment of newly acquired
DHC-4 Caribou cargo planes, to the region at the request of the
South Vietnamese government. Under Hancock, the Caribou had itself only been reluctantly ordered by the Air Force following intense pressure from the Army and the Federal government for a
STOL transport. Concerned at the potential drain on the RAAF's resources, Hancock tried to resist calls for commitments to Vietnam. His negative views were in contrast to the hawkish attitudes of his deputy, Air Vice-Marshal
Colin Hannah, and Air Chief Marshal Scherger, now
Chairman of the Chiefs of Staff Committee and Australia's senior soldier. In April 1965, as part of American operations in Indochina,
United States Air Force strike aircraft took up residence at
Ubon Air Force Base, Thailand, which since 1962 had been home to
No.79 Squadron Sabres and run by the RAAF under
SEATO arrangements. Hancock proposed that Australia continue to command the facility and provide local air defence, though this effectively made the Sabres a support unit in the war effort and therefore potential targets of
North Vietnamese attack; as it happened, none occurred. ==Later life==