Convoy HX 231

Convoy HX 231 was the 231st of the numbered series of Second World War HX convoys of merchant ships from Halifax, Nova Scotia (HalifaX) to Liverpool. The ships departed New York City on 25 March 1943 and were met on 31 March by Escort Group B 7 of the Mid-Ocean Escort Force. The convoy was found by German U-boats on 4 April and attacked by eleven U-boats from the 1st, 3rd, 6th and 10th U-boat flotillas, from Brest, La Rochelle, St Nazaire and Lorient, respectively. The U-boats formed gruppe Löwenherz (Lionheart) and sank six ships before losing contact on 7 April, for the loss of U-632 and U-635. The convoy reached Liverpool on 10 April.