The Fw 190s first significant mass engagement took place on 19 August 1942, during Operation Jubilee, the Allied raid on Dieppe. "Jagdgeschwaders" JG 2 and JG 26 had recently converted from the Bf 109, fielding 115 fighter aircraft during the day's fighting, including a small number of high-altitude Bf 109 G-1 models (although there is doubt as to whether G-1 variants existed as operational types). The RAF committed over 300 fighter aircraft, consisting mostly of Spitfire VB models, with just six squadrons of Spitfire Mk. IXBs, and also some of the new Hawker Typhoons. In addition, several squadrons of Hawker Hurricanes and RAF Allison-engined Mustangs performed fighter-bomber and reconnaissance duties. During the action, the two "Jagdgeschwader" lost 25 Fw 190s to all causes, including crashes, but, in return, they claimed 61 of the 106 Allied aircraft lost that day (JG 26 and JG 2 claiming 40 and 21 respectively). Fighting over occupied territory, the RAF lost 81 pilots and aircrew killed or taken prisoner, against "Luftwaffe" fighter losses of 20 pilots killed (14 from JG 26 and six from JG 2).