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…showed last 75 words of 857 total…real by using a huge number of sources, including, but not only, letters, pictures, and interviews with veterans of the combat. His first hand knowledge of happenings in during the war also helped him. This leaves very few if any serious questions left to the reader, or anything that the reader would need further explanation on. In all his books, Ryan stressed realism and was meticulous in attention to detail and his extensive research notes.