Ever since the Japanese attack, there has been debate as to why and how the United States was caught off guard, and how much and when American officials knew of Japanese plans for an attack.[1][2] Several writers, including journalist Robert Stinnett,[3] retired U.S. Navy Rear Admiral Robert Alfred Theobald,[4] and Harry Elmer Barnes,[5] have argued that various parties high in the governments of the United States and the United Kingdom knew of the attack in advance and may even have let it happen or encouraged it in order to ensure America’s entry into the European theater of World War II via a Japanese–American war started at "the back door", despite the fact Germany and Italy were not obliged to assist Japan in the event of aggression against another power.[6][7][8]
The Pearl Harbor advance-knowledge conspiracy theory is rejected by most historians as a fringe theory, citing several key discrepancies and reliance on dubious sources.[9][10][11]
^Pearl Harbor, Charles Sweeny, Arrow Press, Salt Lake City, UT, 1946.
^Pearl Harbor: The Seeds and Fruits of Infamy, Percy L. Greaves Jr., Ludwig von Mises Institute, 2010.
^Theobald, Robert A., Rear Admiral, USN (rtd). The Final Secret of Pearl Harbor – The Washington Contribution to the Japanese Attack (Devin-Adair Company, 1954).