The RAF Army Co-operation Command was a short-lived command of the Royal Air Force during the Second World War, comprising the army cooperation units of the RAF. The command was formed on 1 December 1940 when No. 22 (Army Co-Operation) Group, previously a part of Fighter Command, was raised to command status. Initially it controlled two groups: No. 70 Group RAF for training and No. 71 Group RAF for operations. In August 1941, 71 Group re-organized its squadrons into a Wing basis. Each wing was directly attached to a UK based Army regional Command. Its function was to act as the focus for activities connected with the interaction of the British Army and the RAF, such as close air support, tactical reconnaissance, artillery spotting and training of anti-aircraft defences. It was also responsible for developing tactics for the invasion of Europe, where direct air support proved to be decisive. Army Co-Operation Command proved to be controversial, with the Chief of the Imperial General Staff General Sir Alan Brooke being an implacable foe of the command arrangement. It was disbanded on 31 March 1943, when most of its units were used to form the Second Tactical Air Force. The command had only had one commander during its short existence, Air Marshal Sir Arthur Barratt. Army Co-operation Command (April 1942) No. 70 (Army Co-operation Training) Group – 1 December 1940 – 1 June 1943 (transferred to ADGB) No. 41 OTU – Lysander / Tomahawk – RAF Old Sarum No. 42 OTU – Various Aircraft – RAF Andover No. 271 Squadron RAF – Albatross / Dominie – RAF Doncaster No. 651 Squadron RAF – Taylorcraft I – RAF Old Sarum Various other flights and minor training units. Wings No. 32 Wing – Scottish Command – Edinburgh No. 309 (Polish) Squadron RAF – Lysander – RAF Dunino No. 614 Squadron RAF – Blenheim – RAF Macmerry No. 33 Wing – Northern Command – York No. 613 Squadron RAF – Tomahawk I/II – RAF Doncaster No. 4 Squadron RAF – Tomahawk I/II – RAF York No. 34 Wing – Eastern Command – Luton No. 140 Squadron RAF – Spitfire PR.I – RAF Benson No. 241 Squadron RAF – Tomahawk I/II – RAF Bottisham No. 2 Squadron RAF – Tomahawk I/II RAF Sawbridgeworth No. 268 Squadron RAF – Tomahawk I/II – RAF Snailwell No. 35 Wing – South Eastern Command – Reigate No. 26 Squadron RAF