Capt. Chadwick Buckner, left, commander of C Company,

Capt. Chadwick Buckner, left, commander of C Company, 1st Battalion, 178th Infantry Regiment of the Illinois National Guard, discusses best practices for providing security during a fly-to-advise training mission with Capt. Daryl Body, Observer Coach Trainer Team Chief assigned to 1st Battalion, 360 Infantry Regiment, 5th Armored Brigade, First Army Division West at McGregor Range Complex, N.M., August 24, 2019. Post-mobilization training for National Guard and Reserve Soldiers has been a responsibility of 5th Armored Brigade and First Army since World War I. (U.S. Army photo by Staff Sgt. Timothy Gray, 5th Armored Brigade)