ISBN-13: 9780773508019 / Angielski / Miękka / 1990 / 416 str.
The U-boats constituted a serious threat to North American security and a major challenge to coastal and convoy defense. Hadley reveals the military and political impact on Canada of in-shore submarine warfare and vibrantly documents the successful German strategy of deploying daring long-range solo sorties to pin down the enemy close to home.