This field manual interim (FMI) describes the organization, mission, and operations of the sustainment brigade and its subordinate functional and multifunctional units. These subordinate units are task organized to the sustainment brigade depending on the specific mission of the brigade. This manual also describes the relationships of the sustainment brigade and its subordinate units to each other and to the organizations they have command and support relationships with as well. This manual applies to the full spectrum of operations extending from stable peace to general war. Doctrine is not intended to cover garrison operation. This manual provides guidance for Army commanders, geographic combatant commanders (GCCs), joint force commanders (JFCs), and logisticians throughout the Army. This field manual interim (FMI) serves as an authoritative reference for students and personnel who - Develop doctrine materiel (fundamental principles and TTP) and force structure. Develop institutional and unit training. Develop standing operating procedures (SOP) for unit operations. This publication applies to the Active Army, the Army National Guard/Army National Guard of the United States, and the United States Reserve unless otherwise stated."