 Virtually all available fighter groups in the west were allocated to this mission , JG 11 was assigned the USAAF airfield at Asch ( Code Name Y – 29 ) and the RAF airfield at Ophoven north of Asch . The 366th Fighter Group ( 366th FG , Ninth Air Force ) and the 352nd Fighter Group ( 352 FG , Eighth Air Force ) were based at Asch . No. 41 , No. 130 , 350 and No. 610 Squadrons of the 2nd Tactical Wing were based at Ophoven . 
