Manual addresses the operational environment & modular force sustainment organizations. It explains the art of battle command from a sustainment commander's perspective. Explains sustainment as one of six warfighting functions (WFF) & presents doctrine for how sustainment is planned, prepared, executed, & continuously assessed. 1 It covers the principles of sustainment & the sustainment WFF. 2 Covers the roles & responsibilities of organizations providing sustainment in support of unified action. Commands, organizations, & agencies that provide sustainment including Joint organizations, Army Generating Forces, & Operating Forces. Sustainment to multinational operations. 3 Command & control. Battle command from a sustainment perspective. Modular force sustainment organization. 4 Discusses the integration of sustainment into operations. Sustainment considerations are integrated into the operations process. 5 Detailed discussion on the major functional elements of sustainment.