Sworn to Secrecy: Secrets of War

9 Season
65 Episode

Sworn to Secrecy: Secrets of War - Season 4 Episode 9 Secret Submarines in WWII


(1 votes, average: 6.00/ 10)

60 minutes 1999 HD

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From silent one-man midget subs to U-boats on secret missions, both sides used secret submersibles of all shapes and sizes to conduct clandestine warfare in the war.

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