▁given ▁the ▁W TO ' s ▁much ▁stronger ▁organ ic ▁air ▁def enses . ▁Bas ing ▁the ▁entire ▁future ▁of ▁the ▁Canadian ▁Army ' s ▁European ▁presence ▁would ▁demand ▁better ▁data ▁and ▁testing ▁if ▁it ▁were ▁to ▁go ▁forward . ▁ ▁Test s ▁ ▁All ▁of ▁these ▁changes ▁resulted ▁in ▁inten se ▁interest ▁in ▁hel ic opter ▁combat ▁in ▁the ▁US , ▁Canada ▁and , ▁increasing ly , ▁the ▁German ▁Bundes wehr . ▁The ▁United ▁States ▁Army ▁Europe ▁began ▁forming ▁plans ▁for ▁extensive ▁tests ▁of ▁hel ic opter ▁combat ▁for ▁early ▁ 1 9 7 2 , ▁with ▁German ▁and ▁Canadian ▁participation . ▁The ▁W TO ▁forces ▁would ▁be ▁made ▁up ▁from ▁Bundes wehr ▁Leop ard ▁t anks ▁and ▁US ▁M 1 6 3 ▁V AD S ▁playing ▁the ▁part ▁of ▁the ▁Z SU - 2 3 - 4 ▁Sh il ka , ▁which ▁had ▁no ▁direct ▁counter part ▁in ▁NAT O . ▁Las ers ▁were ▁used ▁by ▁all ▁vehicles ▁to ▁simulate ▁weapons ▁fire , ▁and ▁las er ▁rece ivers ▁firing ▁smoke ▁gr en ades ▁registered ▁hits . ▁ ▁Two ▁types ▁of ▁combat ▁scenarios ▁were ▁considered . ▁In ▁one , ▁a ▁single ▁A H - 1 G ▁Cob ra ▁attack ▁hel ic opter ▁sim ulating ▁a ▁TO W - equ ipped ▁A H - 1 Q ▁was ▁pa ired ▁with ▁two ▁O H - 5 8 ▁hel ic op ters ▁providing ▁forward ▁observation . ▁This ▁sort ▁of ▁" h unter / k iller " ▁team ▁had ▁been ▁used ▁to ▁great ▁effect ▁in ▁Vietnam