Between 1939 and 1945, 72,200 Allied naval and merchant seamen died. The Germans lost about 30,000 U-boat sailors killed, three-quarters of the 40,000-man U-boat fleet.
between 1939 and 1945 72200 allied naval and merchant seamen died the germans lost about 30000 u-boat sailors killed three-quarters of the 40000-man u-boat fleet