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| U.S. Army Field Manual 4-0 | |
|---|---|
| Name | U.S. Army Field Manual 4-0 |
| Subject | Army sustainment doctrine |
| Publisher | Department of the Army |
| Country | United States |
| Format | Field manual |
| Release date | 2012 (current doctrinal baseline) |
U.S. Army Field Manual 4-0 U.S. Army Field Manual 4-0 codifies sustainment doctrine for the United States Army and outlines functions, roles, and organization for supporting joint and combined operations. It integrates logistics, personnel services, and health services into a single sustainment framework used across echelons from The Pentagon decision-makers to brigade and division commanders. The manual informs interoperability with partners such as the United States Navy, United States Air Force, United States Marine Corps, and multinational formations under NATO.
FM 4-0 defines sustainment as the provision of logistics, personnel, and health services to maintain combat power and endurance for campaigns and operations. It articulates principles derived from historical campaigns including lessons from World War II, the Korean War, the Vietnam War, the Gulf War, and operations in Iraq and Afghanistan. The manual aligns sustainment with joint concepts from documents like Joint Publication 4-0 and supports strategic objectives outlined by the National Security Strategy and guidance from the Secretary of Defense.
FM 4-0 assigns responsibilities across the sustainment community: the Secretary of the Army, the Chief of Staff of the Army, major combatant commands such as United States Central Command, Army Service Component Commands including U.S. Army Europe, and sustainment brigades organic to divisions and corps. It details interactions with agencies like the Defense Logistics Agency, Army Materiel Command, and the Surgeon General of the Army for health services. The manual also addresses coordination with allied logistics staffs such as those in United Kingdom, France, Germany, and partner militaries under frameworks like the North Atlantic Treaty.
FM 4-0 codifies sustainment principles including anticipation, responsiveness, simplicity, economy, survivability, continuity, and improvisation drawn from operational art used by leaders from George C. Marshall era planning to contemporary campaigns led by commanders in Operation Desert Storm and Operation Enduring Freedom. It integrates supply chain management with transportation networks such as Surface Deployment and Distribution Command routes, strategic lift from Military Sealift Command and Air Mobility Command, and maintenance practices influenced by Army Materiel Command. The manual references legal frameworks like the Posse Comitatus Act only where they affect support to civil authorities and highlights interoperability with NATO Standardization Office protocols.
FM 4-0 organizes sustainment into functions: supply, maintenance, transportation, field services, distribution management, personnel services, and health service support, all synchronized to the operational phases described in campaign planning used by staffs in U.S. Central Command and theater armies. It emphasizes phased support from pre-deployment through redeployment, logistics preparation of the battlefield influenced by concepts from AirLand Battle doctrine, and enablers such as contracting with firms under the Federal Acquisition Regulation and coordination with the U.S. Agency for International Development during stability operations.
The manual prescribes structures for sustainment brigades, theater sustainment commands, and multifunctional logistics battalions that support modular force designs established during transformations under the Chief of Staff of the Army initiatives of the early 21st century. It details relationships between echelon-above-brigade sustainment organizations and division sustainment support battalions, referencing formations like I Corps and 3rd Infantry Division as organizational examples. FM 4-0 also describes integration with joint logisticians from U.S. Transportation Command and coalition sustainment elements seen in combined operations such as those conducted by Multinational Force Iraq.
FM 4-0 provides guidance for readiness reporting tied to metrics used by the Department of Defense and supports training regimes in institutions such as the United States Military Academy, Fort Leavenworth's Center for Army Lessons Learned, and the Combined Arms Support Command at Fort Lee. It outlines sustainment exercise constructs for large-scale combat operations similar to exercises like Operation Atlantic Resolve and joint training events with Allied Command Operations. The manual emphasizes professional development for logisticians through schools and certification aligned with standards from Defense Acquisition University.
FM 4-0 evolved from earlier Army doctrine documents and troop support manuals produced throughout the 20th century, reflecting transformations after conflicts including World War I logistics reforms, interwar lessons codified by planners at The War College, and Cold War sustainment practices shaped by theater plans in Europe. Major revisions correspond to doctrinal shifts following Operation Desert Shield/Operation Desert Storm and the post-9/11 campaigns in Iraq and Afghanistan, with updates integrating joint doctrine from Joint Chiefs of Staff publications and lessons captured by organizations such as the Government Accountability Office.