▁III . ▁ ▁No . ▁ 4 ▁( Supp lement ary ) ▁F lying ▁Inst ruct ors ▁School ▁R AF . ▁ ▁No . ▁ 2 7 6 1 ▁Squadron ▁R AF ▁Regiment . ▁ ▁R AF ▁( Bel g ian ) ▁Training ▁School . ▁ ▁United ▁States ▁Army ▁Air ▁Forces ▁use ▁With ▁the ▁arrival ▁of ▁large ▁numbers ▁of ▁USA AF ▁f ighter ▁groups ▁in ▁ 1 9 4 3 , ▁B ott ish am ▁was ▁allocated ▁to ▁the ▁Americans ▁and ▁assigned ▁design ation ▁as ▁Station ▁ 3 7 4 ▁( IM ). ▁ ▁The ▁air field ▁was ▁en larg ed ▁and ▁areas ▁of ▁steel ▁m atting ▁were ▁laid . ▁ ▁USA AF ▁Station ▁Units ▁assigned ▁to ▁R AF ▁B ott ish am ▁were : ▁▁ 5 0 th ▁Service ▁Group ▁ ▁( V III ▁Air ▁Force ▁Service ▁Command ) ▁▁ 4 6 8 th ▁and ▁ 4 6 9 th ▁Services ▁Squad rons ; ▁H HS ▁ 5 0 th ▁Service ▁Group ▁▁ 1 8 th ▁We ather ▁Squadron ▁▁ 6 6 th ▁Station ▁Com plement ▁Squadron ▁▁ 1 0 7 3 rd ▁Qu arter master ▁Company ▁▁ 1 0 9 7 th ▁Sign al ▁Company ▁▁ 1 1 8 4 th ▁Military ▁Police ▁Company ▁▁ 1 5 9 8 th ▁Or dn ance ▁Supp ly ▁& ▁Main ten ance ▁Company ▁▁ 2 1 1 8 th ▁Engine er ▁Fire ▁Fight ing ▁Pl ato on ▁▁ 3 6 1 st ▁F ighter ▁Group ▁ ▁The ▁air field ▁was ▁first ▁used ▁by ▁the