 "U-124" was shelled by the coastal battery at Fort Thornton, Georgetown on Ascension Island on 9 December; no damage was sustained.A change of operational area saw the boat deploy to the Eastern United States seaboard following the success of Operation Drumbeat ("Paukenschlag"); leaving Lorient on 21 February 1942.Like the original 'drumbeaters', Mohr found the US defences easy to penetrate.