Logistics (military)

Sometimes, in very informal military discussions, someone will offer a toast: "Amateurs talk tactics. Dilettantes talk strategy. Professionals talk logistics." Obviously, the toast was offered by someone with a bias toward logistics, but there is much truth to it. Strategy determines why to fight, the form of one's forces, and where to fight. Tactics defines how the fight is conducted once begun.

Logistics, however, make it possible for to be ready to fight, and have the materials to conduct and sustain the fight. Napoleon is said to have observed "an army marches on its stomach", meaning that no army can function without a supply of food, and making sure that food is available, in adequate quanities, is a basic part of the supply discipline of logistics. A different discipline, transportation, ensures the food gets from the port where it arrives on a ship, to the cooks that will prepare it. Both operational procedures and research have places in research, just as combat forces have their rules on how to encircle a military force with a helicopter-borne (i.e., air assault) unit, logisticians worked out the procedure by which a short-ranged helicopter can be refueled at each jump closer to its target.

In the United States military, chosen here because it tends to write down more about the way it does things than any other military, logistics is:

‘	The science of planning and carrying out the movement and maintenance of forces. In its most comprehensive sense, those aspects of military operations that deal with: a. design and development, acquisition, storage, movement, distribution, maintenance, evacuation, and disposition of materiel; b. movement, evacuation, and hospitalization of personnel; c. acquisition or construction, maintenance, operation, and disposition of facilities; and d. acquisition or furnishing of services	’
—Department of Defense Dictionary of Military and Associated Terms

The primary manual on logistical doctrine goes further, and defines its scope as "the integration of strategic, operational, and tactical sustainment efforts within the theater, while scheduling the mobilization and deployment of units, personnel, equipment, and supplies in support of the employment concept of a ... commander. The relative combat power that military forces can bring to bear against an enemy is constrained by a nation’s capability to plan for, gain access to, and deliver forces and materiel to the required points of application across the range of military operations."

Logistical service	Functions that make logistics practical
Supply	logistical planning and reearch
Transportation	distribution
Civil engineering	sustainment
Health services	procurement and contracting
Maintenance	disposition and disposal

Civil engineering and facility procurement

Beans and bullets do not last well if they are kept in the rain. Logisticians have to have transportation routes from the source of supply, to the warehousing and distribution points, to the supported units. Minimally, this means that things such as roads, airfields, docks and warehouses need either to be built by civil engineers (contrast with combat engineer)s, or perhaps it will be possible to locate, rent, and customize warehouses and other facilities.