Hennessy, John J.

John J. Hennessy is one of the leading Civil War battle historians of his generation and author of the definitive book on the Battle of Second Manassas, Return to Bull Run (978-0-8061-3187-0). He previously served as a ranger at the Manassas battlefield and is currently chief historian at Fredericksburg and Spotsylvania National Military Park. He lives in Fredericksburg, Virginia.