Phillip S. Greenwalt is the co-founder of Emerging Revolutionary War and historical editor for the Emerging Revolutionary War Series. He is also a full-time contributor to Emerging Civil War. Phillip is the co-author of A Single Blow: The Battles of Lexington and Concord and the Beginning of the American Revolution, April 19, 1775, with Robert Orrison and three books in the Emerging Civil War Series. He is currently a park ranger for the National Park Service.