Allied intelligence was aware off this and deployed forces against them.[1] In the ensuing actions Borkum boats U-305 and U-415 attacked escort carrier Card, without success, while two destroyers were sunk; Leary by U-275 and Hurricane by U-415. U-645 was destroyed by destroyer Schenck[2] and the Bernau force lost a destroyer and two torpedo boats. The blockade runners were also lost.