On 7 December 1941, the concentrated striking power of the Imperial Japanese Navy's mobile force—six carriers and more than 350 planes—shattered the heart of the U.S. Navy's Pacific Fleet. The Pearl Harbor raid destroyed the U.S. battle line, shredded Admiral Husband E. Kimmel's plans for offensive action in the central Pacific, and freed the Japanese to advance southward through the Philippines and Netherlands East Indies. The physical toll was devastating, but the mental one was arguably worse.

https://www.usni.org/magazines/proceedings/2022/october/intellectual-readiness-vital-sea-power

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