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Hell Below is an event-based series charting the stealth game of sub sea warfare, tracking the dramatic narrative from contact to attack of the greatest submarine patrols of World War II. From the rise of the Wolfpack to the drive for victory in the Pacific, we profile the strategic masterminds and the rapid evolution of technology and tactics, as the threat of undersea warfare...。为获取军统局破译密码的绝密资料，展开了一场惊险刺激的国际间谍战。。