Field Manual 4-0 — LLMpedia

Field Manual 4-0
Name	Field Manual 4-0
Subject	United States Army doctrine
First published	2014
Publisher	United States Army Training and Doctrine Command
Language	English

Contents

Field Manual 4-0 Field Manual 4-0 is a United States Army doctrinal publication that addresses sustainment, logistics, and support operations for deployed forces. It frames relationships among Department of Defense, United States Army, Joint Chiefs of Staff, United States Central Command, and allied logistics institutions such as North Atlantic Treaty Organization, United States Transportation Command, and Defense Logistics Agency. The manual integrates concepts relevant to campaigns involving partners such as Coalition Provisional Authority, United Nations, European Union, and regional actors like NATO Response Force and African Union contingents.

Overview

The manual defines sustainment responsibilities across echelons including Secretary of Defense, Secretary of the Army, Army Chief of Staff, Theater Sustainment Command, Corps, Division, and brigade support elements. It synthesizes doctrine from earlier publications issued by United States Army Training and Doctrine Command, Combined Arms Center, Institute of Land Warfare, and allied doctrines such as British Army and Australian Defence Force logistics manuals. The text aligns sustainment functions with operational frameworks used by Operational Detachment Alpha, III Corps, XVIII Airborne Corps, and theater partners like United States Africa Command and United States European Command.

Development traces to post-Cold War lessons from operations including Operation Desert Storm, Operation Enduring Freedom, Operation Iraqi Freedom, and stability missions in Balkans. Reform initiatives involved doctrine authors from Army Materiel Command, Army Sustainment Command, and academic contributors from United States Military Academy and National Defense University. Key doctrinal shifts referenced logistical reforms inspired by historical campaigns such as the Normandy landings and the Berlin Airlift, and by institutional reviews following inquiries into sustainment shortfalls during Hurricane Katrina response and Operation Restore Hope.

The manual organizes sustainment functions into thematic areas covering supply, maintenance, transportation, health services, personnel services, and host-nation support across formations including Brigade Combat Team, Sustainment Brigade, Combat Sustainment Support Battalion, and Theater Sustainment Command. Doctrinal linkages connect to joint publications authored by Joint Staff elements, interoperability standards from NATO Standardization Office, and logistics automation programs like Global Combat Support System–Army. Command relationships reference chains involving Combatant Commanders, Joint Task Force, Theater Sustainment Command, and subordinate echelons including Division Support Command and Forward Support Company.

Core principles emphasize unity of effort among actors such as Department of State, United States Agency for International Development, International Committee of the Red Cross, and host-nation authorities; anticipation informed by historical models like Logistics in the American Revolution; and operational reach comparable to analyses from RAND Corporation and Center for Strategic and International Studies. Concepts include distribution-based logistics used by formations like 1st Cavalry Division and 82nd Airborne Division, multifunctional sustainment integration seen in Sustainment Command (Expeditionary), and resilience measures reflecting lessons from Superstorm Sandy and Fukushima Daiichi nuclear disaster responses. The manual frames sustainment as enabling maneuver for formations from XV Corps to Light Infantry Brigade Combat Team.

Implementation guidance includes training curricula coordinated with institutions such as United States Army Training and Doctrine Command, Combined Arms Support Command, National Training Center, and Joint Readiness Training Center, with exercises like Operation Atlantic Resolve and Defender Europe used to validate concepts. Professional military education modules involve schools including Command and General Staff College, School of Advanced Military Studies, and Army War College, and incorporate joint training with Marine Corps Combat Service Support Schools and United States Air Force Logistics Readiness Squadron units. Doctrine was promulgated through publications, software like LogSAAS and simulation wargames used at Combat Training Center rotations.

Critiques arose from analysts at Government Accountability Office, Congressional Research Service, and think tanks including Brookings Institution and Heritage Foundation concerning assumptions about sustainment in contested logistics environments and reliance on host-nation support modeled after Coalition Provisional Authority experiences. Subsequent revisions incorporated feedback from after-action reviews of Operation Inherent Resolve and lessons from ally exercises with United Kingdom, Canada, and Germany. Updates also responded to doctrinal debates documented by scholars at Massachusetts Institute of Technology and Stanford University on autonomy, cyber logistics threats highlighted by U.S. Cyber Command, and resilience priorities advocated by Department of Homeland Security.