Eminent scholar Roger Moorhouse recently spoke to Military Times to discuss his book, “Wolfpack: Inside Hitler’s U-Boat War," which released Tuesday.

The U.S. Navy's use of pigeons began decades before World War II, but the birds found their most critical mission during the war—flying messages from submarine-hunting blimps during a time when radio silence was essential.

RAF Mosquitos were famed for speed and precision, and their low-level raids on German U-boats were among the war’s riskiest missions. This recreation brings the danger to life from three dramatic angles.