#48: U-48: The Deadliest U-Boat of World War II
U-48 sank more Allied tonnage than any other submarine in World War II, 51 confirmed ships totaling over 306,000 gross register tons. Under commanders Herbert Schultze, Hans-Rudolf Rösing, and Heinrich Bleichrodt, this single Type VIIB submarine accounted for more merchant shipping than many entire navies lost during the war.
Commissioned in April 1939, U-48 operated during the "Happy Time" when German submarines devastated Allied convoys with near impunity in the Atlantic. Her patrol record reads like a masterclass in submarine naval warfare: she completed 12 war patrols between 1939 and 1941 before being relegated to training duties. Her extraordinary kill tally demonstrated the terrifying effectiveness of submarine warfare against merchant shipping and shaped Allied naval strategy for the remainder of the conflict.
