Munich Agreement. Based on his study of German documents, Weinberg established that the demands made by Hitler on the cession of the Sudetenland region of Czechoslovakia were not intended to be accepted but were rather to provide a pretext for aggression against Czechoslovakia. Weinberg has established that Hitler regarded the Munich Agreement as a diplomatic defeat, which deprived Germany of the war that was intended to begin on October 1, 1938. Weinberg has argued against the thesis that Chamberlain was responsible for the failure of the proposed putsch in Germany in 1938. Weinberg has argued that the three visits to London in the summer of 1938 of three messengers from the opposition, each bearing the same message (if only Britain would promise to go to war if Czechoslovakia was attacked, then a putsch would remove the Nazi regime, each ignorant of the other messengers' existence), presented a picture of a group of people apparently not very well organized and that it is unreasonable for historians to have expected Chamberlain to stake all upon uncorroborated words of such a badly-organized group. In a 2007 review of Ian Kershaw's Fateful Choices, Weinberg, though generally favorable to Kershaw, commented that Chamberlain played a far more important role in the decision to fight on despite the great German victories in the spring of 1940 and in ensuring that Churchill was his successor, instead of the peace-minded Lord Halifax, than Kershaw gave him credit for in his book. Weinberg's picture of Chamberlain has led to criticism; the American historian Williamson Murray condemned Weinberg for his "... attempts to present the British Prime Minister in as favorable a light as possible". Hitler diaries controversy In 1983, when the German illustrated weekly magazine Der Stern reported its purchase of the alleged diaries of Adolf Hitler, the U.S. weekly magazine Newsweek asked Weinberg to examine them hurriedly in a bank vault in Zürich, Switzerland. Together with Hugh Trevor-Roper and Eberhard Jäckel, Weinberg was one of the three experts on Hitler asked to examine the alleged diaries. Squeezing the visit into just a few hours so as not to miss any of his teaching assignments at Chapel Hill, Weinberg reported in Newsweek that "on balance I am inclined to consider the material authentic." Weinberg also noted that the purported journals would likely add less to our understanding of the Second World War than many might have thought and that