A main change of command occurred when Joachim Müncheberg left II. "Gruppe" on 21 July 1942 and replaced by Conny Meyer. In August 1942 the British and Canadians carried out Operation Jubilee, a raid on Dieppe harbour. Fighter, Command and Coastal Commands supported the Commando landings with powerful air forces. The RAF did not succeed in forcing the Luftwaffe into a pitched-battle over the beachhead and Fighter Command in particular, suffered heavy casualties. The British claimed to have inflicted heavy casualties on the Luftwaffe, the balance sheet showed the reverse; Allied aircraft losses amounted to 106, including 88 RAF fighters (70 Spitfires were lost to all causes) and 18 bombers, against 48 Luftwaffe aircraft lost. Included in that total were 28 bombers, half of them Dornier Do 217s from KG 2. The two German "Jagdgeschwader" units had the following results: JG 2 lost 14 Fw 190s with eight pilots killed and JG 26 lost six Fw 190s with six pilots killed. The Spitfire Squadrons, 42 with Mark Vs, and only four with Mark IXs were tasked with close air support, fighter escort and air-superiority missions. The exact number of Spitfires lost to the Fw 190 "gruppen" is unknown. The "Luftwaffe" claimed 61 of the 106 RAF machines lost, which included all types: JG 2 claimed 40 and JG 26 claimed 21. Wing Commander Minden Blake was among the notable British casualties. the 130 Squadron leader was captured after being shot down by a Fw 190.