America’s Secret Weapon In The War Against Japan | Secrets Of War | War Stories



The story of America’s code-breaking efforts against seemingly impenetrable secret Japanese military and diplomatic communications. The heroic struggle of Army code-breakers, headed by William Friedman, and the Navy’s secret “on-the-roof-gang” help win the Battle of the Pacific.

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00:00 Introduction
00:53 Deciphering Japanese Codes
05:06 HH Promo
05:41 Friedman
12:39 Decrypting Japanese Codes
20:34 Pearl Harbor
23:28 War With Japan
28:32 JN-25
32:10 Port Moresby
36:27 Midway
39:22 Assassinating Yamamoto
42:04 The End Of The War
47:50 Post War

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26 thoughts on “America’s Secret Weapon In The War Against Japan | Secrets Of War | War Stories”

  1. Historian Max Hastings pointed out that US and UK criptologists were often Jewish.
    The Nazis had just as many criptologists, but were significantly less successful.
    Perhaps this explains the allies' great success, he suggested.

    Reply
  2. Henry Stimson was a Republican, so of course he'd end the code breaking. We all know the republicans don't care about keeping the US safe. Every republican I've ever come across would sell this country down the road at the first chance. Stimson, trump, they are all the same. Crooks.

    Reply
  3. The biggest problem Naval Intelligence in Pearl Harbor had was that no one could come up with a logical explanation for why Japan would even consider attacking the US, as it very clear to them that there was no rational reason to expect that the US wouldn't mop the floor with the Japanese in any war due to the overwhelming advantages the US had in resources, and that included capital a vast advantage in Naval capital ships under construction and due for completion in a relatively short time. In addition, everything the Japanese needed, and everything the US was refusing to send Japan, was at that point readily available to the Japanese if the Japanese went after the colonial empires of the countries that Germany had conquered in 1940. But as that all proved, one can never be sure of what it was your opponent doesn't properly understand.

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  4. While it is correct that in June 1942, total IJN forces headed for Midway far outnumbered USN forces, the USN TFs were much closer in number to Kido Butai, especially in number of planes, and the "Main Body", in which Yamamoto and the battleship Yamato sailed was several hundred miles from Kido Butai. Similarly, the IJN carrier group attacking the Aleutians was far from Midway. By the IJN scattering their forces, the USN TFs could, if necessary, deal with the several IJN groups separately in near-parity or superiority.

    Reply
  5. Plans to attack Pearl Harbor were the worst kept secret in the Japanese military. Dozens, possibly scores of Japanese not involved knew of the plan yet none of them leaked it.

    Reply

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