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Did President Roosevelt know that Japan was planning an attack on Pearl Harbor?

  • He just knew

    He just knew he just knew he just knew he just knew he just knew he just knew he just knew he just knew he just knew he just knew he just knew he just knew he just knew he just knew he just knew he just knew he knew

  • America had prior knowledge of the attack however they wanted to create a reason to join war

    The Pearl Harbor advance-knowledge conspiracy theory is the argument that American government officials had advance knowledge of Japan's December 7, 1941 attack on Pearl Harbor. Ever since the Japanese attack there has been debate as to how and why the United States had been caught off guard, and how much and when American officials knew of Japanese plans for an attack. In September 1944, John T. Flynn,a co-founder of the pro-isolation America First Committee,launched Pearl Harbor revisionism when he published a forty-six page booklet entitled The Truth about Pearl Harbor.

    Several writers, including journalist Robert Stinnett,retired U.S. Navy Rear Admiral Robert A Theobald,and Harry Elmer Barnes have argued various parties high in the U.S. and British governments knew of the attack in advance and may even have let it happen or encouraged it in order to force America into the European theatre of World War II via a Japanese–American war started at "the back door”. Evidence supporting this view is taken from quotations and source documents from the time and the release of newer materials. However, the Pearl Harbor advance-knowledge conspiracy is considered to be a fringe theory and is rejected by most mainstream historians.

  • America had prior knowledge of the attack however they wanted to create a reason to join war

    The Pearl Harbor advance-knowledge conspiracy theory is the argument that American government officials had advance knowledge of Japan's December 7, 1941 attack on Pearl Harbor. Ever since the Japanese attack there has been debate as to how and why the United States had been caught off guard, and how much and when American officials knew of Japanese plans for an attack. In September 1944, John T. Flynn,a co-founder of the pro-isolation America First Committee,launched Pearl Harbor revisionism when he published a forty-six page booklet entitled The Truth about Pearl Harbor.

    Several writers, including journalist Robert Stinnett,retired U.S. Navy Rear Admiral Robert A Theobald,and Harry Elmer Barnes have argued various parties high in the U.S. and British governments knew of the attack in advance and may even have let it happen or encouraged it in order to force America into the European theatre of World War II via a Japanese–American war started at "the back door”. Evidence supporting this view is taken from quotations and source documents from the time and the release of newer materials. However, the Pearl Harbor advance-knowledge conspiracy is considered to be a fringe theory and is rejected by most mainstream historians.

  • America had prior knowledge of the attack however they wanted to create a reason to join war

    The Pearl Harbor advance-knowledge conspiracy theory is the argument that American government officials had advance knowledge of Japan's December 7, 1941 attack on Pearl Harbor. Ever since the Japanese attack there has been debate as to how and why the United States had been caught off guard, and how much and when American officials knew of Japanese plans for an attack. In September 1944, John T. Flynn,a co-founder of the pro-isolation America First Committee,launched Pearl Harbor revisionism when he published a forty-six page booklet entitled The Truth about Pearl Harbor.

    Several writers, including journalist Robert Stinnett,retired U.S. Navy Rear Admiral Robert A Theobald,and Harry Elmer Barnes have argued various parties high in the U.S. and British governments knew of the attack in advance and may even have let it happen or encouraged it in order to force America into the European theatre of World War II via a Japanese–American war started at "the back door”. Evidence supporting this view is taken from quotations and source documents from the time and the release of newer materials. However, the Pearl Harbor advance-knowledge conspiracy is considered to be a fringe theory and is rejected by most mainstream historians.

  • PEARL HARBOR WAS SUPRISED FDR wasnt

    FDR knew pearl harbor was coming, japan declared war on the united states as of November 30th 1945 and FDR removed particular ships from the harbor, as of December 1st FDR knew it was coming there were also intercepted messages (decoded) from japan asking for the exact locations of all battleships in the harbor? How would he not know?\

  • Surely he knew, he broke many of the codes and while the sailors were sleeping and drunken from the night before they did not expect.

    The night before the attack on Pearl Harbor they were drinking and they passed out, likely Japan had sent spies and attacked while they were asleep therefore it wasn't only FDRs fault but he could of kept them on their toes. He Definitely knew about the attack. For sure he did.

  • FDR knew about the attack.

    This is too obvious. The Japanese codes were broken, and showed an attack on Pearl Harbor. Numerous people told FDR that there was going to be an attack. Almost a whole year before the attack, the Peruvian envoy in Tokyo told the third secretary in the US embassy that the Japanese were going to attack Pearl Harbor as a part of their war plan. The US military attache in Tokyo reported that the Japanese Navy were secretly practicing airborne torpedo attacks on targets that resembles Pearl Harbor.

  • He did and there is proof

    They did know about the attack but it wasnt put on high alert for some reason, so the rest of the militia didn't know about it until it already happened. There was no "surprise" attack. They already knew it was going to happen. End of story. Period. Exclamation point. Done.

  • Expected and Known in Advance

    Franklim D Roosevelt expected some kind of attack from the Japanese. Americans were able to intercept radio communications between the Japanese military about the attack. Even on the day of the attack, mysterious planes appeared on the radar bet were regarded as American planes. What an infamous "surprise attack" on Pearl Harbor!!

  • Interviews of the presidents advisors

    In a CBC documentary US in WWII, it shows the first hand account of this situation by interviewing the president's trusted advisor. The advisor is called in by the president, following the attack on pearl harbour, and when the advisor gets there he describes the president fixing his stamp collection. This shows that Roosevelt was expecting such a disaster.

  • President Roosevelt did not know there was to be an attack on Pearl Harbor because he would not have allowed such a vicious attack on the United States itself.

    While he may have supposed that some kind of attack would happen at some time and somewhere (maybe the Philippines, Guam, or Midway), to imagine that he would have allowed the attack that took place would be to imagine that he was somehow traitorous. Far too much damage was done and far too many lives lost in the Pearl Harbor attack to believe that the President of this country could have known about it and allowed it to happen. President Roosevelt loved the Navy, having once been Assistant Secretary of the Navy. Surely he could not have willingly let something so bad happen to the very organization he had once helped to lead.

    Posted by: OnfBIeak
  • He knew an attack was likely, not the place and time.

    Intelligence has always been a game of partial information and best guesses. The US government clearly knew that Japan intended to attack them at some point, but knowing the date and time of the operation is usually impossible. Even within the Japanese government and military very few people knew the date and time of the attack or the place.

    Think about 9/11, it was common knowledge that Al Quaeda wanted to attack the United States, and had completed prior attacks, but the place and time weren't known until it happened.

    Posted by: MaraW
  • President Roosevelt would have taken adequate measures to protect the country in the face of such an attack, hence I oppose.

    Japan would have planned their attack in a most secretive manner. Details of such an attack does not normally leak out to common public, and in extreme cases, to the country in question. President Roosevelt would have taken appropriate preventive measures to safeguard the interest of his nation and its people.

    Posted by: WormanNiv
  • President Roosevelt knew nothing about the Japanese planning to attack Pearl Harbor.

    Roosevelt did not know about the possible attacks. The situation was tense and he was afraid regarding possible actions from the Japanese, but he never imagined they would attack Pearl Harbor. The Japanese were very silent and the attacks were a complete surprise for everybody, including Roosevelt. Roosevelt at that time was analyzing the possibility of declaring war on Japan. The attacks made him make the decision very quickly.

    Posted by: l0olllooi
  • Why would He Let it happen

    He wouldn't let such a thing happen to the US mainly because we lost a majority of our fleet during that encounter. If he knew about it he would have prevented it to prevent such losses to the armed forces. It would be unacceptable losses if he allowed it. What the Japanese did to pearl harbor was a massacre not a battle if FDR knew then he would have made it a battle.

  • There was no possible way that FDR could have known that the attack would be at Pearl Harbor

    Even though the Japanese code was broken and translated, not in a single message did the Japanese say where the attack was going to be located. Yes FDR and his advisers were aware of a possible attack, however they thought it would happen in the South Pacific like the Philippians. The troops in the Philippians were prepared for an attack, they even had planes transported to them in case of an attack. In conclusion FDR was ware of a possible threat, but he did not know it was going to be at Pearl Harbor.

  • He knew Japan was planning an attack, but not where.

    Roosevelt knew Japan and the U.S. were on the verge of war, but there was little evidence to suggest that there would be an attack would be on Pearl Harbor. Intercepted messages suggested that Guam and the Philippines were far more likely to be the targets of a Japanese attack.

  • He did and there is proof

    They did know about the attack but it wasnt put on high alert for some reason, so the rest of the militia didn't know about it until it already happened. There was no "surprise" attack. They already knew it was going to happen. End of story. Period. Exclamation point. Done.

  • Sometimes a surprise attack is just a surprise attack. It happens.

    The Japanese fleet air arm attack was bold, aggressive, and had certain elements of innovation in techniques, tactics and modifications to existing equipment to expand capability. Also, radio deception practices mislead US Navy Intelligence and strict secrecy measures helped to achieve surprise.

    U.S. Navy aviation experts in Hawaii testified before post-attack investigations that they were surprised by the Japanese naval air strike
    (ie. William Halsey and Arthur Davis, USN).

  • FDR led to war by secret cabal

    The President was surrounded by forces, which can only be characterized as fascist sympathizers.
    Many such as Avrell Harriman were implicated througb banking interests in aiding the rise of Hitler. If war is the health of the state, it is certainly the health of banking and manufacturers of war materiel. Harriman styled himself as a 'democrat' and had the ear of the president.

    Many American companies such as IBM were also abetting Germany's war efforts. FDR did not close a blind eye to the perils implicit in the gamesmanship of political power struggles. Roosevelt detractors looked for an easy out to explain away their own duplicitous relationships. He became the target for their cover story over the decades. No industrialist or banker went to jail for high treason; FDR has been defamed for trying to do the right thing. We are now paying the price for wrong choices. Will we never learn?


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