▁Group ▁H Q . ▁ ▁World ▁War ▁II ▁Second ▁Line ▁T F ▁units ▁and ▁form ations ▁were ▁not ▁reform ed ▁after ▁the ▁war . ▁However , ▁the ▁ 5 8 th ▁Division ▁and ▁the ▁ 1 7 3 rd ▁Brigade ▁were ▁used ▁during ▁World ▁War ▁II ▁for ▁' phantom ▁form ations ' ▁as ▁part ▁of ▁Operation ▁Fort itude . ▁They ▁were ▁chosen ▁on ▁the ▁basis ▁of ▁Ult ra ▁reports ▁that ▁showed ▁the ▁Germ ans ▁believed ▁a ▁ 5 8 th ▁Infantry ▁Division ▁existed ▁in ▁the ▁vic inity ▁of ▁W inds or . ▁This ▁mis ident ification ▁was ▁then ▁supported ▁by ▁sim ulated ▁radio ▁traffic ▁and ▁by ▁fict it ious ▁reports ▁from ▁double ▁agents ▁working ▁for ▁the ▁British ▁Security ▁Service , ▁M I 5 . ▁ ▁As ▁part ▁of ▁Four th ▁Army ' s ▁II ▁Corps , ▁the ▁' div ision ' ▁took ▁the ▁role ▁of ▁a ▁mountain ▁trained ▁assault ▁formation ▁in ▁' F ort itude ▁North ' ▁( H Q : ▁Aber l our ) ▁and ▁the ▁role ▁of ▁follow ▁up ▁unit ▁in ▁' F ort itude ▁South ' ▁( H Q : ▁Gra ves end ). ▁It ▁was ▁dis posed ▁of ▁by ▁announ cing ▁that ▁the ▁division ▁had ▁moved ▁to ▁H ert ford shire ▁and ▁been ▁dis band ed ▁in ▁April ▁ 1 9 4 5 . ▁ ▁The ▁formation ' s ▁ins ign ia , ▁a ▁stag ' s ▁face ▁full ▁on ▁a ▁black ▁square ▁was ▁chosen ▁to ▁support ▁the ▁division ' s ▁fict ional ▁back - story , ▁that ▁it