EpisodeS4E960 min
Sworn to Secrecy: Secrets of War
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.
Sworn to Secrecy: Secrets of War
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.