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Watch Sworn to Secrecy: Secrets of War Season 1 Episode 4 Online
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- COUNTRIES: United States of America,South Korea,United Kingdom,France,Germany,Russia,Vietnam
- Subtitles: English
They were the stuff of fantasy and terror. Instruments of sabotage and clandestine operations. Born of great desperation and used under the cover of darkness, special tools of spies and espionage agents delivered war to the heart of the enemy on the invisible battleground.
