Master Sgt. Jack O’Brien, an instructor supporting

Master Sgt. Jack O’Brien, an instructor supporting the 13th Battalion, 100th Regiment at Fort McCoy, Wis., checks teaching material while completing a program-of-instruction review Oct. 26, 2016, of the 89B Ammunition Specialist Course taught by the battalion. During fiscal year 2017, the battalion saw an increase in number of students training at Fort McCoy as the unit added an Advanced Leadership Course, Senior Leadership Course, and other courses to its curriculum. (U.S. Army Photo by Scott T. Sturkol, Public Affairs Office, Fort McCoy, Wis.)