If you consider the definition of sustainment operations, it is hard to imagine any one thing maintaining a sturdy foundation without sustaining factors. For the Army, sustainment has a more in depth definition. Sustainment is the provision of logistics, personnel services, and health service support necessary to maintain operations until successful mission completion. It must be planned and synchronized with the operations at every level. It is dependent upon joint and strategic links and must be meticulously coordinated to ensure resources are delivered to the lowest level of need. Therefore, sustainment is inherently joint. (ADP 4-0).
As we continue to fight our Nation wars we will always need to sustain our force.