While war was raging on land a whole new breed of war was being waged in the oceans of the world. The German submarine U-Boat threat was a dangerous game of sink or swim against British and American forces. From convoys to merchants the battle saw over 100,000 lives lost at sea in a brutal and terrifying new kind of warfare.

• DirectorNick Randall
• Release1 January 2021
• GenreDocumentary
• Duration2h
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