Stephen Ambrose was an author accused of plagiarism.
The History News Network lists seven works of Ambrose's such as The Wild Blue, Undaunted Courage, Nothing Like It In the World, Nixon: Ruin and Recovery, Citizen Soldiers, The Supreme Commander, and Crazy Horse and Custer that copied twelve authors.

Ambrose's response to the accusation of him plagiarising was "I always footnoted, I always gave other writers credit, I made only a few tiny mistakes in thousands of superb pages"

In later years, it was found that he did not plagiarise. He simply omitted quotation marks in a few passages of his books when he had already footnoted the author he was quoting.