▁of ▁ 6 0 th ' s ▁guns ▁were ▁affected . ▁( L ater ▁it ▁became ▁common ▁practice ▁to ▁have ▁fire ▁miss ions ▁for ▁H AA ▁guns ▁tim ed ▁so ▁that ▁there ▁were ▁intervals ▁for ▁cool ing .) ▁ ▁In ▁early ▁November ▁the ▁brig ade ▁rel ieved ▁ 1 0 0 th ▁AA ▁B de ▁def ending ▁the ▁W aal ▁brid ges ▁at ▁N ij m egen ▁that ▁had ▁been ▁captured ▁during ▁Operation ▁Market ▁Garden . ▁Although ▁AA ▁defence ▁had ▁priority , ▁each ▁H AA ▁regiment ▁had ▁a ▁battery ▁on ▁call ▁for ▁def ensive ▁fire ▁and ▁counter - b atter y ▁fire ▁miss ions ▁in ▁support ▁of ▁the ▁Al lied ▁bridge head . ▁ 6 0 th ▁H AA ▁Regiment ▁reported ▁that ▁by ▁now ▁it ▁had ▁fired ▁ 2 5 , 0 0 0 ▁r ounds ▁in ▁ground ▁fire ▁tasks ▁since ▁its ▁arrival ▁in ▁Norm andy . ▁Its ▁variety ▁of ▁targets ▁was ▁now ▁en larg ed ▁to ▁include ▁V - 1 ▁flying ▁bomb s ▁passing ▁overhead ▁towards ▁Ant werp . ▁ ▁Bad ▁weather ▁set ▁in ▁during ▁December , ▁with ▁w ides p read ▁flo oding , ▁and ▁ 1 6 8 ▁B ty ▁had ▁to ▁be ▁res cu ed ▁by ▁river ▁bar ge . ▁There ▁was ▁little ▁activity ▁by ▁the ▁Luft wa ffe , ▁but ▁on ▁ 1 7 ▁December ▁it ▁carried ▁out ▁strik es ▁all ▁along ▁the ▁Al lied ▁front , ▁with ▁F ock e - W ulf ▁F w ▁ 1 9 0 s ▁and ▁Mess ersch mitt ▁B f ▁