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15 abr 1941 ano - "U.S. intelligence officers continue to monitor Japanese secret messages. In a program code-named Magic, U.S. intelligence uses a machine to decode Japan's diplomatic dispatches. Washington does not communicate all the available information to all commands, including Short and Kimmel in Hawaii."

Adicionado na linha do tempo:

Data:

15 abr 1941 ano
Agora
~ 84 years ago