Robert Cowley is an American military historian, who writes on topics in American and European military history ranging from the Civil War through World War II. He has held several senior positions in book and magazine publishing and is the founding editor of the award-winning MHQ: The Quarterly Journal of Military History; Cowley has also written extensively and edited three collections of essays in counterfactual history known as What If?

As part of his research he has traveled the entire length of the Western Front, from the North Sea to the Swiss Border.

He currently lives in New York and Connecticut.