"Modern combat is complex and demanding. To fight and win, we must train our soldiers during peacetime to successfully execute their wartime missions. We must use every training opportunity to improve soldier, leader, and unit task performance. To improve their individual and collective-task performances to meet or exceed the Army standard, soldiers and leaders must know and understand what happened or did not happen during every training event. After-action reviews (AARs) help provide soldiers and units feedback on mission and task performances in training and in combat. After-action reviews identify how to correct deficiencies, sustain strengths, and focus on performance of specific mission essential tasks list (METL) training objectives. This training circular (TC) is a leader's guide on how to plan, prepare, and conduct an AAR. It supplements and expands the guidance in Field Manual (FM) 25-101. Competent leaders must understand and apply the techniques and procedures which produce good AARs."