This Field Manual (FM) addresses the role of medical logistics (MEDLOG) in the Army's distribution-based supply system. It covers MEDLOG operations from the support battalions at the tactical level to the medical command (deployment support) (MEDCOM DS]) and theater sustainment command (TSC) (where the critical crossover occurs between strategic Army Health System AHS] agencies and commands and the operational units performing Army distribution in-theater). The target audience for this manual is commanders, their staffs, medical planners, and MEDLOG officers and personnel at all levels. This publication applies to the Active Army, Army National Guard (ARNG)/Army National Guard of the United States (ARNGUS), and United States Army Reserve (USAR) unless otherwise stated.