John Brewster Hattendorf, D.Phil., D.Litt., L.H.D., FRHistS, FSNR, (born December 22, 1941) is an American naval historian. He is the author, co-author, editor, or co-editor of more than fifty books, mainly on British and American maritime history and naval warfare. In 2005, the U.S. Naval Institute Proceedings described him as "one of the most widely known and well-respected naval historians in the world." In reference to his work on the history of naval strategy, an academic in Britain termed him the "doyen of US naval educators." A Dutch scholar went further to say that Hattendorf "may rightly be called one of the most influential maritime historians in the world." From 1984 to 2016, he was the Ernest J. King Professor of Maritime History at the United States Naval War College in Newport, Rhode Island. He has called maritime history "a subject that touches on both the greatest moments of the human spirit as well as on the worst, including war." In 2011, the Naval War College announced the establishment of the Hattendorf Prize for Distinguished Original Research in Maritime History, named for him. The 2014 Oxford Naval Conference - "Strategy and the Sea" - celebrated his distinguished career on April 10–12, 2014. The proceedings of the conference were published as a festschrift. In March 2016, Hattendorf received the higher doctorate of Doctor of Letters (D.Litt.) from the University of Oxford. Among the few Americans to have received such designation, Hattendorf remained actively engaged on the Naval War College campus after his formal retirement in 2016.