Most people don't know how high the casualty rates were in general in WWII. The German U-Boat force lost 28,000 men out of 40,900 total crew. By the last year o

Most people don't know how high the casualty rates were in general in WWII. The German U-Boat force lost 28,000 men out of 40,900 total crew. By the last year of the war, thanks to airborne radar and Allied ULTRA decrypts, the survival rate of U-Boats in the Atlantic was less than one patrol.