The two battalions and supporting units went through training and preparation for an assessment exercise, a modified US Army Readiness Training Evaluation Program (ARTEP), which was held in late 2009. When declared operational, the 23rd Infantry Brigade was planned to be commanded by a colonel with a headquarters of 113 personnel. Supporting units were to include a band platoon (40 members), engineer company (220 strong), Brigade Training Unit (162 strong, now retitled the Armed Forces Training Command, located at Camp Ware under Major Wleh), and a military police company (105 strong).