During his 31 years as a Regular Army and National Guard officer; Parker Hills served in various command and staff positions in the United States and overseas. Hills retired with the rank of brigadier general in 2001. He served as president of an advertising agency for fifteen years in Jackson, Mississippi, and established Battle Focus, a leadership training company, upon his military retirement. Through Battle Focus, Hills has conducted corporate leadership training, military staff rides and battlefield tours. He has served as the president of two non-profit organizations involved in battlefield preservation: Friends of the Vicksburg Campaign and Historic Trail, and Friends of Raymond. A graduate of the U.S. Army War College, Hills is the author of A Study in Warfighting: Nathan Bedford Forrest and the Battle of Brice's Crossroads, and co-author of the Vicksburg Campaign Driving Tour Guide.