Round 12: Tossup 17

Johnnie Walker’s creation of the “creeping attack” helped destroy many of these things during “Black May.” Twenty-four Spigot Mortars were employed on the “Hedgehog” device used for countering these things (-5[1])that were developed under Plan Z. These things largely ran rampant during the First and Second “Happy Times.” Bases were (*) traded for weapons used to counter these vessels as part of the Lend-Lease program. Admiral Karl Dönitz pioneered the “Wolf Pack” strategy employed by these vessels during the Battle of the Atlantic. Depth charges were used against, for 10 points, what commerce-raiding Nazi Submarines operated during World War II? ■END■ (10[1])

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