▁ 3 3 2 ▁Hal if ax es ▁and ▁ 2 0 ▁Mos qu itos ▁of ▁all ▁groups ▁bom bed ▁the ▁naval ▁base , ▁air field ▁and ▁town ▁" al most ▁into ▁cr ater - p itted ▁mo ons cap es ". ▁Three ▁Hal if ax es ▁were ▁lost ; ▁the ▁islands ▁were ▁ev acu ated ▁the ▁following ▁night . ▁▁ 1 9 ▁April ▁ 1 9 4 5 ▁– ▁Hel ig ol and ▁▁ 3 6 ▁Lanc aster s ▁used ▁T all boy ▁bomb s ▁against ▁coast al ▁positions . ▁▁ 8 ▁December ▁and ▁ 1 1 ▁December ▁ 1 9 4 4 ▁The ▁Ur ft ▁Dam , ▁( ▁south ▁west ▁of ▁C ologne ) ▁was ▁attacked ▁to ▁prevent ▁it ▁being ▁used ▁to ▁flo od ▁the ▁area ▁as ▁American ▁troops ▁advanced . ▁The ▁lip ▁of ▁the ▁dam ▁was ▁dam aged , ▁but ▁the ▁Germ ans ▁prevent ed ▁further ▁damage ▁by ▁lower ing ▁the ▁water ▁level . ▁▁ 2 1 ▁December ▁ 1 9 4 4 ▁– ▁Pol itz ▁ 6 1 7 ▁Squadron . ▁▁ 1 4 ▁March ▁ 1 9 4 5 ▁– ▁B iele feld ▁and ▁Ar ns berg ▁vi ad uct s ▁The ▁vi ad uct s ▁were ▁attacked ▁by ▁ 6 1 7 ▁and ▁ 9 ▁squad rons ▁with ▁T all bo ys ▁and ▁the ▁first ▁Grand ▁Sl ams . ▁The ▁Ar ns berg ▁vi ad uct ▁with stood ▁the ▁attack ▁but ▁ ▁of ▁the ▁B iele feld ▁vi ad uct ▁col lapsed ▁through ▁the ▁' ear th