9 Season
65 Episode
Sworn to Secrecy: Secrets of War - Season 4 Episode 9 Secret Submarines in WWII
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.
- Country : United States of America, South Korea, United Kingdom, France, Germany, Russia, Vietnam
- Genre : War & Politics, Documentary
- Director :
- Cast : Charlton Heston
