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Stephen E. Ambrose
Stephen Edward Ambrose (January 10, 1936 – October 13, 2002) was an American historian, most noted for his biographies of U.S. Presidents Dwight D. Eisenhower and Richard Nixon. He was a longtime professor of history at the University of New Orleans and the author of many bestselling volumes of American popular history.
There have been numerous well documented allegations of plagiarism, inaccuracies, and sloppiness in Ambrose's writings in addition to claims that he has made about his works. However, in a review of To America: Personal Reflections of an Historian for The New York Times, high school teacher William Everdell credited the historian with reaching "an important lay audience without endorsing its every prejudice."
Source: Wikipedia