d ut y ▁members ▁and ▁approximately ▁ 8 0 ▁aircraft , ▁including ▁the ▁F - 1 5 ▁E agle , ▁E - 3 ▁S entry , ▁K C - 1 3 5 ▁Str at ot ank er ▁and ▁the ▁H H - 6 0 ▁P ave ▁Haw k . ▁ ▁The ▁group ▁is ▁one ▁of ▁the ▁oldest ▁in ▁the ▁United ▁States ▁Air ▁Force , ▁being ▁a ▁successor ▁organization ▁of ▁the ▁ 1 8 th ▁P urs uit ▁Group , ▁one ▁of ▁the ▁ 1 5 ▁original ▁combat ▁air ▁groups ▁formed ▁by ▁the ▁Army ▁before ▁World ▁War ▁II . ▁ ▁Units ▁The ▁group ' s ▁nine ▁squad rons ▁( T ail ▁Code : ▁Z Z ) ▁and ▁flight ▁include : ▁▁ 1 8 th ▁Aer omed ical ▁Ev acu ation ▁Squadron ▁( A ES ) ▁▁ 1 8 th ▁Oper ations ▁Support ▁Squadron ▁( O SS ) ▁▁ 4 4 th ▁F ighter ▁Squadron ▁( FS ) ▁( F - 1 5 ▁E agle ) ▁▁ 6 7 th ▁F ighter ▁Squadron ▁( FS ) ▁( F - 1 5 ▁E agle ) ▁▁ 3 1 st ▁Res cue ▁Squadron ▁( R Q S ) ▁▁ 3 3 d ▁Res cue ▁Squadron ▁( R Q S ) ▁( HH - 6 0 G ▁P ave ▁Haw k ) ▁▁ 6 2 3 d ▁Air ▁Control ▁Fl ight ▁( AC F ) ▁▁ 9 0 9 th ▁Air ▁Ref uel ing ▁Squadron ▁( AR S ) ▁( K C - 1 3 5 R ▁Str