Pearl Harbor is often summarized as simple American unreadiness. Japan combined careful execution with an unusually long run of favorable circumstances. The carrier force remained undetected, submarine contacts failed to trigger a general alert, radar warning was dismissed, and aircraft and ships remained poorly prepared. Acting on any one of those opportunities could have produced a more organized defense and substantially reduced the raid's effect without requiring perfect foreknowledge. The missed opportunity lay in the cumulative failure to convert repeated warnings into readiness.
Notable Point · 2:08:01-2:08:43
The long chain of Japanese luck
The concluding judgment credits Japanese execution while emphasizing how many American opportunities existed to make the raid less successful.