e, which meant "East Wind Rain," reached Roosevelt on November 26th and was decoded as "United States War" on the 28th. Ralph Briggs, at the Navy's East Coast Intercept station, received the "East Wind Rain" message in the early hours of December 4th. He put it on the TWX circuit immediately and called his commander. The log sheet between 0500 hours and 1300 hours has been deleted from the files. JN-25, the Japanese Navy’s Cryptographic System, was used by Yamamototo to give the order that the Striking Force will move out of Hitokappu Wan on the morning of November 26th and advance to the standby position on the afternoon of December 4th. This was a critical message because it revealed that a strike force had assembled in the Kurile islands, it was huge comprising of the First Fleet, the Second Fleet, and a number of aircraft carriers, and the voyage was so far that it required fue
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