Black May (1943)

Black May
Part of The Battle of the Atlantic
Depth charges exploding from the destroyer HMS Vanoc during an Atlantic convoy in May 1943
Date 29 April – 24 May 1943 Location Atlantic Ocean Result Allied victory
Belligerents
United Kingdom  Canada	Germany
Commanders and leaders
Max Horton John Slessor	Karl Dönitz
Strength
Royal Navy Merchant navy	240 submarines
Casualties and losses
58 ships sunk	43 submarines destroyed 37 submarines damaged

Black May refers to a period (May 1943) in the Battle of the Atlantic campaign during World War II, when the German U-boat arm (U-Bootwaffe) suffered high casualties with fewer Allied ships sunk; it is considered a turning point in the Battle of the Atlantic.