The U.S.secret weapon in the Pacific campaign was

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The U.S. secret weapon in the Pacific campaign was the code-breaking operation known as Magic, which gave U.S. forces vital intelligence regarding Japanese plans and movements. This enabled the U.S. to anticipate Japanese attacks and strategically plan its own operations. While the other options listed may have played a role in the Pacific campaign, the code-breaking operation was a significant factor in the U.S. victory.

The U.S.secret Weapon in the Pacific Campaign Was