Dr. Mark T. Calhoun earned his PhD in History from the University of Kansas in 2012. He is the author of General Lesley J. McNair: Unsung Architect of the U.S. Army (University Press of Kansas, 2015), the first comprehensive military life of General Lesley J. McNair. The book reveals previously unpublished details of McNair's forty-year career and assesses the impact of McNair’s views and actions on America's mobilization for and involvement in World War II. Dr. Calhoun's current research interests center on General William H. Simpson, commander of Ninth US Army, and Ninth Army’s operations during the campaign in Northwest Europe from 1944 to 1945. A career US Army CH-47 Chinook helicopter pilot and war planner, Dr. Calhoun retired as a Lieutenant Colonel in 2008, after which he served for fourteen years as an associate professor on the faculty of the US Army’s School of Advanced Military Studies.