time ▁attacks ▁in ▁good ▁weather , ▁and ▁concerns ▁were ▁raised ▁that ▁European ▁weather ▁would ▁not ▁allow ▁them ▁to ▁operate ▁at ▁the ▁required ▁level . ▁ ▁After math ▁The ▁most ▁immediate ▁effect ▁of ▁the ▁Ans bach ▁tests ▁was ▁the ▁re open ing ▁of ▁the ▁debate ▁about ▁the ▁ob sol esc ence ▁of ▁the ▁tank ▁on ▁the ▁modern ▁battle field . ▁That ▁the ▁tank ▁was ▁the ▁primary ▁weapon ▁of ▁the ▁anti - t ank ▁defense ▁had ▁ris en ▁to ▁the ▁point ▁of ▁being ▁official ▁doctrine ; ▁FM ▁ 1 7 - 1 ▁stated ▁that ▁" The ▁tank ▁is ▁the ▁primary ▁arm or - de fe ating ▁weapon ▁of ▁arm ored ▁form ations ." ▁Ans bach ▁caused ▁those ▁in ▁support ▁of ▁the ▁hel ic opter ▁to ▁claim ▁the ▁era ▁of ▁the ▁tank ▁was ▁over , ▁or ▁as ▁one ▁observer ▁put ▁it : ▁ ▁The ▁tests ▁had ▁been ▁carried ▁out ▁just ▁as ▁the ▁new ▁X M - 1 ▁tank ▁began ▁its ▁design ▁cycle ▁and ▁was ▁spe ar head ing ▁a ▁renew ed ▁interest ▁in ▁t anks . ▁This ▁was ▁bol ster ed ▁by ▁the ▁events ▁in ▁the ▁Y om ▁K ipp ur ▁War ▁of ▁ 1 9 7 3 , ▁where ▁the ▁Israel ▁Def ense ▁Forces ▁( ID F ) ▁" utter ly ▁defeated ▁combined ▁arm ies ▁equal ▁in ▁strength ▁to ▁NAT O ▁Europe " ▁and ▁suggested ▁that ▁it ▁was ▁" ob vious ▁that ▁arm or ▁is ▁battle field - de cis ive ▁so ▁long ▁as ▁it ▁is ▁used ▁wis ely ." ▁ ▁TH ES ▁Looking ▁to