@Dinglehoff - an excellent question. What made those men culpable was complicated, and I'm not sure I could sum up the book in a few paragraphs. Perhaps I can hit a few high points. I urge anyone interested to pick it up, whether at a library or by purchase. It is a deep inside look at how the Army and Navy were run and how they interfaced with the government pre-war - IE how the military sausage was made - and it will help the reader to understand why initial US military performance was so bad and late-war performance so good.
The Army and Navy separately prepared reports on the attack but both were full of whitewash; they were aimed at avoiding blame rather than finding truth. Clausen also suspected the Army report had false testimony in it and was slanted to slight Roosevelt and George C Marshall in order to protect General Short and his staff. His investigation bears that out - some testimony was incomplete or not truthful. Clausen was directed by the Secretary of War (over all armed forces at that time) to prepare a full and true report. He was given extraordinary powers, interviewed around a hundred people, reviewd 30-something volumes of testimony and evidence and made an unsparing report.
Basically, the situation was that diplomatic talks between Japan and the US were not making any progress. The US knew that Japan was living on borrowed time - on stored oil - and that some Japanese response would soon be coming. But whether it would be a renewed diplomatic offer, a strong short-of-war closing of the embassies or outright war was unknown.
US governmental and military officials did not believe war was likely. They thought Japan was a weaker power (true), knew it (possibly true) and would act rationally (false). They also only understood their own viewpoint... Admiral Kimmel even told his officers that Japan would strike at the Soviets, but not this winter - the Germans were pulling back from Moscow and there would be no point. So there does seem to have been an awareness that trouble was possible, but everyone had their peacetime rose-colored glasses on and had a giant chip on their shoulder. Pre-war assessment of Japanese armed forces was frankly condescending and dismissive. They missed the fact that a skilled knife man can carve you up with a butter knife, especially if what you think is a butter knife turns out to be three feet of sharp steel.
It is true that Japan's penchant for a surprise attack was known and that American naval maneuvers had shown that a surprise aerial attack on Pearl Harbor was possible. But against that the harbor was very shallow, the distance from Hawaii from Japan was extreme, the US Army defenses (including airplanes) were extensive and there was a feeling that any large movement of the Japanese fleet must inevitably be spotted. And, of course, US carriers could do it but the Japanese certainly could not... Peacetime routine and complacency led officers in Washington and Honolulu to disregard the signs they did receive. No-one in the US government or military realized that Japan had resolved on war in October and was already moving ships.
The US had partially broken some Japanese codes. Not the naval codes to a great extent, but they did have some success with the diplomatic codes (as Purple and Magic). That doesn't mean they could read the entire text outright: they could read parts of it, after it was translated from Japanese and after they tried to fill in the missing parts and work through the cultural gaps and assumptions. The key thing was that Japanese diplomatic staff were instructed to burn papers and break up their code machines. The former might have just been a signal to the US that 'we are angry', followed by a return of diplomats to Japan and a period of sulking. The latter was much more serious as it implied the staff would soon be unable to move the equipment.
The US had intelligence sections with separate pieces in the Army and Navy and in Washington and Honolulu. Naturally none of the pieces would talk to the others... and there were the usual bureaucratic power-struggles over who reported to whom, so message traffic moved around slowly and incompletely. Plus, again, there was the peacetime mindset: no hurry, office hours only, we'll know if they start to move, they really wouldn't dare, it's the weekend after all.
Repeated alerts were sent to the armed forces and especially to commanders in the Philippines and Hawaii, but they were full of 'may' and 'could' and 'possible' since the code-breaking could not be revealed. This had the effect of crying 'wolf'. Plus there was the peacetime attitude of, 'don't overstep your bounds - wait for direct orders'. Washington thought the commanders had been warned and were ready but the commanders thought they should maintain routine and Washington had to directly tell them that war was declared. MacArthur was as culpable as Kimmel and Short but MacArthur was needed to command the Philippine Army against invasion and was politically prominent whereas the others were not - so he got promoted and they were reprimanded for essentially the same lack of action (though the Philippines had nowhere near the death toll and destruction in the initial attacks).
Admiral Kimmel and General Short took the blame because they let their forces be surprised and got thousands of Americans killed: they were responsible for their men and for their commands and they failed to take precautions. Most of the others on Clausen's list were intelligence officers who were playing power games, taking a long time to transmit information or just not pushing hard enough when they thought it was urgent. The President was listed as culpable because his office commands the military. He thought he had given them sufficient warning but they thought he had not been clear and direct enough. The President was handicapped by the fading-but-still-strong power of the isolationists - no 'provocative' actions (like any change from the routine) could be taken without a political fight.
In my opinion, a great deal of the 'blame' for the Pearl Harbor attack goes to the Japanese Navy, who prepared and executed the operation with consummate skill. Every contingency had been planned out and the actual attack went even better than they had hoped. It was an impressive, truly professional effort that would have been hard for the Royal Navy or the US Navy of the time to match... But the fact is, neither American or British officers took the Japanese armed forces seriously before WW2. As the old Confederate said, when asked why the Confederacy failed, "I rather thought the Yankees had something to do with it." So if we ask why Pearl Harbor was such a disaster, perhaps the Japanese Navy had something to do with it.
The Army and Navy separately prepared reports on the attack but both were full of whitewash; they were aimed at avoiding blame rather than finding truth. Clausen also suspected the Army report had false testimony in it and was slanted to slight Roosevelt and George C Marshall in order to protect General Short and his staff. His investigation bears that out - some testimony was incomplete or not truthful. Clausen was directed by the Secretary of War (over all armed forces at that time) to prepare a full and true report. He was given extraordinary powers, interviewed around a hundred people, reviewd 30-something volumes of testimony and evidence and made an unsparing report.
Basically, the situation was that diplomatic talks between Japan and the US were not making any progress. The US knew that Japan was living on borrowed time - on stored oil - and that some Japanese response would soon be coming. But whether it would be a renewed diplomatic offer, a strong short-of-war closing of the embassies or outright war was unknown.
US governmental and military officials did not believe war was likely. They thought Japan was a weaker power (true), knew it (possibly true) and would act rationally (false). They also only understood their own viewpoint... Admiral Kimmel even told his officers that Japan would strike at the Soviets, but not this winter - the Germans were pulling back from Moscow and there would be no point. So there does seem to have been an awareness that trouble was possible, but everyone had their peacetime rose-colored glasses on and had a giant chip on their shoulder. Pre-war assessment of Japanese armed forces was frankly condescending and dismissive. They missed the fact that a skilled knife man can carve you up with a butter knife, especially if what you think is a butter knife turns out to be three feet of sharp steel.
It is true that Japan's penchant for a surprise attack was known and that American naval maneuvers had shown that a surprise aerial attack on Pearl Harbor was possible. But against that the harbor was very shallow, the distance from Hawaii from Japan was extreme, the US Army defenses (including airplanes) were extensive and there was a feeling that any large movement of the Japanese fleet must inevitably be spotted. And, of course, US carriers could do it but the Japanese certainly could not... Peacetime routine and complacency led officers in Washington and Honolulu to disregard the signs they did receive. No-one in the US government or military realized that Japan had resolved on war in October and was already moving ships.
The US had partially broken some Japanese codes. Not the naval codes to a great extent, but they did have some success with the diplomatic codes (as Purple and Magic). That doesn't mean they could read the entire text outright: they could read parts of it, after it was translated from Japanese and after they tried to fill in the missing parts and work through the cultural gaps and assumptions. The key thing was that Japanese diplomatic staff were instructed to burn papers and break up their code machines. The former might have just been a signal to the US that 'we are angry', followed by a return of diplomats to Japan and a period of sulking. The latter was much more serious as it implied the staff would soon be unable to move the equipment.
The US had intelligence sections with separate pieces in the Army and Navy and in Washington and Honolulu. Naturally none of the pieces would talk to the others... and there were the usual bureaucratic power-struggles over who reported to whom, so message traffic moved around slowly and incompletely. Plus, again, there was the peacetime mindset: no hurry, office hours only, we'll know if they start to move, they really wouldn't dare, it's the weekend after all.
Repeated alerts were sent to the armed forces and especially to commanders in the Philippines and Hawaii, but they were full of 'may' and 'could' and 'possible' since the code-breaking could not be revealed. This had the effect of crying 'wolf'. Plus there was the peacetime attitude of, 'don't overstep your bounds - wait for direct orders'. Washington thought the commanders had been warned and were ready but the commanders thought they should maintain routine and Washington had to directly tell them that war was declared. MacArthur was as culpable as Kimmel and Short but MacArthur was needed to command the Philippine Army against invasion and was politically prominent whereas the others were not - so he got promoted and they were reprimanded for essentially the same lack of action (though the Philippines had nowhere near the death toll and destruction in the initial attacks).
Admiral Kimmel and General Short took the blame because they let their forces be surprised and got thousands of Americans killed: they were responsible for their men and for their commands and they failed to take precautions. Most of the others on Clausen's list were intelligence officers who were playing power games, taking a long time to transmit information or just not pushing hard enough when they thought it was urgent. The President was listed as culpable because his office commands the military. He thought he had given them sufficient warning but they thought he had not been clear and direct enough. The President was handicapped by the fading-but-still-strong power of the isolationists - no 'provocative' actions (like any change from the routine) could be taken without a political fight.
In my opinion, a great deal of the 'blame' for the Pearl Harbor attack goes to the Japanese Navy, who prepared and executed the operation with consummate skill. Every contingency had been planned out and the actual attack went even better than they had hoped. It was an impressive, truly professional effort that would have been hard for the Royal Navy or the US Navy of the time to match... But the fact is, neither American or British officers took the Japanese armed forces seriously before WW2. As the old Confederate said, when asked why the Confederacy failed, "I rather thought the Yankees had something to do with it." So if we ask why Pearl Harbor was such a disaster, perhaps the Japanese Navy had something to do with it.
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