Newly Declassified Memo Reveals Roosevelt Was Warned of Tokyo’s Focus on Hawaii Days Before Pearl Harbor Attack


Pearl Harbor Attack, 7 December 1941
The USS Maryland (BB-46) alongside the capsized USS Oklahoma (BB-37) at Pearl Harbor. The USS West Virginia (BB-48) is burning in the background. (History Navy)

A newly released memo revealed that President Roosevelt was warned that Tokyo was focused on Hawaii days before the attack on Pearl Harbor.
Washington Whispers reported:

Three days before the Dec. 7, 1941 Japanese attack on Pearl Harbor, President Roosevelt was warned in a memo from naval intelligence that Tokyo’s military and spy network was focused on Hawaii, a new and eerie reminder of FDR’s failure to act on a basket load of tips that war was near.

In the newly revealed 20-page memo from FDR’s declassified FBI file, the Office of Naval Intelligence on December 4 warned, “In anticipation of open conflict with this country, Japan is vigorously utilizing every available agency to secure military, naval and commercial information, paying particular attention to the West Coast, the Panama Canal and the Territory of Hawaii.”

The memo, published in the new book December 1941: 31 Days that Changed America and Saved the World went on to say that the Japanese were collecting “detailed technical information” that would be specifically used by its navy. To collect and analyze information, they were building a network of spies through their U.S. embassies and consulates.

Historian and acclaimed Reagan biographer Craig Shirley, author of the just released December 1941, doesn’t blame FDR for blowing it, but instead tells Whispers that it “does suggest that there were more pieces to the puzzle” that the administration missed.

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