Col. William B. Chastain

COL Brent Chastain was born and raised in Kennesaw, Georgia. He graduated from the University of Georgia in 2001 and commissioned through ROTC as a Second Lieutenant of Armor. He first served as a Tank Platoon Leader in 2nd Battalion, 72nd Armor in the Republic of Korea.

COL Chastain next served in the 3rd Infantry Division at Fort Stewart, Georgia as a Tank Platoon Leader, Cavalry Troop Executive Officer, Special Detachment Commander, Maintenance Officer, Headquarters Troop Commander, and Reconnaissance Troop Commander in the 3rd Squadron, 7th US Cavalry and as a Protocol Officer and on the 3rd Infantry Division Staff. COL Chastain also deployed to Iraq in 2005 and 2007 with 3-7 CAV.

COL Chastain next served at Fort Irwin, California as a Battalion XO/Staff Observer-Coach/Trainer at the National Training Center on the Tarantula Team. COL Chastain then served in the 1st Brigade, 1st Armored Division at Fort Bliss, Texas as the 1st Battalion, 36th Infantry Executive Officer and as the 6th Squadron, 1st US Cavalry Operations Officer. While assigned to the 1st Armored Division, he was the TF Southeast (Train, Advise, and Assist) J3 under NATO’s RESOLUTE SUPPORT mission in Afghanistan.

Upon redeployment, COL Chastain served at NATO’s Allied Joint Force Command Naples, in Italy, as a Joint Operations Center Duty Officer and a J35 Staff Officer. COL Chastain commanded the 2nd Squadron, 1st US Cavalry, 1st SBCT, 4ID at Fort Carson, Colorado from 2019 to 2021. From 2021 to 2022 he served as the G3 of the Maneuver Center at Fort Benning, Georgia. His previous assignment before arriving to the 3d Cavalry Regiment he served as the Chief, Collective Training Division in the HQ Department of the Army G-3/5/7, Directorate of Training at the Pentagon. COL Chastain currently serves as the 81st Regimental Commander for the 3d Cavalry Regiment in Fort Hood, Texas.

COL Chastain is a graduate of the U.S. Marine Corps Expeditionary Warfare School, the Command and General Staff College, the U.S. Joint Forces Staff College, and the U.S. Army War College. He earned a Master of Science in Political Science from the University of Oregon and a Master of Arts in Defense Strategy from the U.S. Army War College. COL Chastain’s awards and decorations include the Bronze Star Medal with Valor, the Defense Meritorious Service Medal, the Combat Action Badge, and the Parachutist Badge.