Lt. Col. (Retired) Adrian G. Traas, 90 of Alexandria passed away on Saturday, September 14, 2024. Born in Milwaukee, Wisconsin, he received his education at schools in Milwaukee and Delafield, Wisconsin, completing high school at St. John’s Military Academy in Delafield, commission and bachelor of arts degree in history from Marquette University and a master of arts degree in history from Texas A&M University. His military education includes the engineer basic and advanced courses, the U.S. Army Command and General Staff College and the Air War College. Colonel Traas served in a variety of command and staff positions as an officer in the Corps of Engineers from 1957 to 1989. He was a company commander of engineer units in Korea and at Ft. Belvoir, Virginia; post commander of engineer in Verona, Italy; executive officer and commanding officer of the 64^th Engineer Battalion with headquarters in Leghorn, Italy, and mapping projects in Ethiopia, Liberia and Iran; assistant professor of military science at Texas A&M; chief of the Combat Support Branch and staff officer in the Concepts and Studies Division at the U.S. Army Engineer School, Fort Belvoir and professor of military science at Marquette. He served two tours in Vietnam and prior to his retirement, he served in administrative positions and as a historian to the U.S. Army Center of Military History. He authored several books and held the title of visiting professor at the Center of Military History. Survivors include his sister in law, Pamela Traas and numerous nieces and nephews. In addition to his parents, Adrian and Susan Traas, his is also preceded in death by his siblings, Thomas Traas, Maryann Silvernale and Donald Traas. Burial, with full military honors, will take place in Arlington National Cemetery on January 15, 2025 at 3pm.