Formerly known as Sustainment Unit One Stop (SUOS),
this portal is managed by the U.S. Army Combined Arms Support Command (CASCOM) and
provides consolidated access to Army sustainment resources, including training, doctrine, lessons learned,
and more.
Please check the recent activity section below for links to new and updated sustainment resources.
Also find commonly referenced sustainment resources and streaming video products below.
Utilize the search field and categories
in the menu to find more resources.
Recent Activity
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FM 4-0 Revision Update - The final draft of FM 4-0, Sustainment Operations, is currently out for worldwide staffing and comment. Click here to learn more.Ongoing Updates
FM 4-0 Revision Update
The final draft of FM 4-0, Sustainment Operations, is currently out for worldwide staffing and comment.
May 2024: Review and adjudications of Final draft Comments
The Sustainment warfighting function appreciates the review and comments provided on the final draft staffing of FM 4-0, Sustainment Operations. The revision is undergoing final reviews in preparation for final approval and release for publishing in early fourth quarter.This revision describes sustainment operations in support of multidomain operations maintaining the Army's focus on large-scale combat operations. It discusses sustainment operations in the strategic contexts within the current contested operational environments at all levels of warfare. FM 4-0 serves as a companion manual to FM 3-0, Operations.
The sustainment warfighting function is comprised of tasks and functions that enable the continuity of sustainment across the levels of warfare throughout all domains. The tasks and functions are linked collectively and executed across the competition continuum to support operational objectives and unified action partners by enabling freedom of action, extending operational reach, and prolonging endurance during operations.
As part of this revision, the FM 4-0 logic chart (click here to view) provides a graphic display of the field manual and its contents to capture the relationships and contribution of sustainment in operations.
Reading the logic chart from the top to the bottom:
- • The chart starts on the top with the boxes depicting threat characteristics presented by peer adversaries and the anticipated operational environment in which multi domain operations will be conducted.
- • The unified action box captures the role of the military in conducting operations on behalf of the government capturing the importance of the Army's contribution, as part of the joint force conducting unified action. The box on the left it captures the importance of the Army's multidomain operations contributions while on the right-hand side displays the significant role of the sustainment warfighting function.
- • Next the chart depicts how sustainment capabilities are task organized to support operational forces conducting operations (offense, defense, stability, and DSCA) in the strategic contexts of competition, crisis, and armed conflict at echelon across all five domains understood through the three dimensions.
- • The chart concludes by portraying how sustainment of large-scale combat operations requires integration of the sustainment warfighting function into the operations process to enable freedom of action, extend operational reach, and provide the prolonged endurance necessary to accomplish missions, consolidate gains and win our nation's wars.
November 2023: Final draft of FM 4-0, Sustainment Operations
This revision of FM 4-0, Sustainment Operations, captures sustainment operations in support of multidomain operations. This doctrinal revision retains the Army's focus on large-scale combat operations and highlights methods to visualize and conduct sustainment operations in the strategic contexts within the current contested operational environments at all levels of warfare. FM 4-0 is a companion manual to FM 3-0, Operations. The sustainment warfighting function team welcomes your review, comments, and insights on the attached final draft.This manual is being formally staffed through the Enterprise Task Management System Solutions (ETMS2), originally known as the Task Management Tool (TMT). Please provide comments on the attached standardized comment resolution matrix to your command for consolidation. The use of the matrix is mandatory to facilitate the task of consolidating and adjudicating all comments. Please read the comment matrix primer to understand how to capture comments correctly. Provide rationale for each comment, including page, paragraph, and line number, along with suggested correction or solution. Recommend using specific line-in/line-out comments to avoiding general comments that criticize text content and provide little or no specific recommended corrections.
Please feel free to contact us with any questions or concerns
Thanks for your contributions to our keystone sustainment doctrinal manual! Click Here to view the final draft of FM 4-0.
October 2023: The revision of FM 4-0 based on the publication of FM 3-0, Operations
With the continued preparation and revision of the FM 4-0, Sustainment Operations draft for final staffing, there are several sustainment considerations, based on the publication of FM 3-0, Operations on 11 October 2022. The new publication shifted the Army contribution to unified action from conducting Unified Land Operations to Multidomain operations. Multidomain operations are the combined arms employment of Joint and Army capabilities to create and exploit relative advantages that achieve objectives, defeat enemy forces, and consolidate gains on behalf of joint force commanders. Some of the big ideas captured in FM 3-0 include:- • Codifying Multidomain Operations as the Army's operational concept.
- • Organizing chapters around the range of military operations that occur along the competition continuum in the context of competition, crisis, and conflict.
- • Describing the Operational Environment (OE) as having five physical domains (air, ground, space, cyberspace, maritime) understood through three dimensions (physical, information, human).
- • Updating the operational framework: deep, close, rear, and support areas within the strategic framework.
- • Establishing the Theater Strategic level of war as a fourth distinct level separate from national strategic framework.
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• Developing new Tenets and new Imperatives applicable to operations.
- - Tenets describe desirable attributes of operations (Agility, Convergence, Endurance, Depth).
- - Imperatives are actions Army forces must take to defeat an enemy and succeed in the multidomain OE.
- • Adding a maritime considerations chapter and an appendix on contested deployment based on INDOPACOM threat implications.
- • Adding a maritime considerations chapter and an appendix on contested deployment based on INDOPACOM threat implications.
- • Identifying the Division as the principal tactical warfighting formation
This doctrinal revision of FM 3-0 is nested in the evolution of sustainment doctrine. Sustainment doctrine is shifting from an organization-based focus to a task/function-based focus. Sustainment doctrine, where applicable, is now organized by echelon level within the context of competition, crisis, and armed conflict. The planned updates to the FM 4-0 Sustainment Operations manual mirror the FM 3-0 chapters. The book focuses on describing sustainment through:
- • The purpose of sustaining operations in the change from Unified Land Operation to Multidomain operations.
- • Addressing sustainment operations in the contexts of competition, crisis, and armed conflict.
- • The roles and responsibilities of organizations by highlighting sustainment activities at the national strategic and theater strategic levels of warfare as well as the operational and tactical levels.
- • Sustainment tasks and functions for each element of the sustainment warfighting function (SWfF) logistics, financial management, personnel services, and health service support based on the levels of warfare to apply combat power described and visualized the operational framework of deep, close, rear, and support area operations.
- • Adding a chapter on sustainment considerations and operations in a maritime operational environment (OE).
- • Placing emphasis on contested logistics and efficiencies needed through decision dominance, autonomous distribution, demand reduction, advanced power, maritime operations to conduct sustainment in a contested OE.
- • Adding descriptions of predictive logistics as a means to achieve precision sustainment.
- • Aligning sustainment operations with the tenets and imperatives for success during multidomain operations.
- • Providing a chapter focused on sustainment leadership considerations and challenges.
- • Moving the detailed “Principles of Sustainment” doctrine discussion in Appendix A of the current FM 4-0 to ADP 4-0 to better establish the foundational underpinnings of the SWfF.
August 2023: The revision of FM 4-0 and the creation of the new echelon sustainment doctrine
Click Here for more details.
The revision is aligned with the recent update to FM 3-0, Operations and provides information on how the Army provides sustainment support across the range of military operations during large-scale combat operations. The FM describes how Army forces meet sustainment challenges and conduct multidomain operations as part of a joint and multinational force. FM 4-0 provides tactics and procedures that addresses the four elements of the sustainment warfighting function (logistics, financial management, personnel services, and health service support) and is the capstone Army sustainment doctrine reinforced by the multiple recently published Army Techniques Publications. ATP 4-93, Theater Sustainment Operations, ATP 4-92, Field Army and Corps Sustainment Operations, and ATP 4-91, Division Sustainment Operations, that delve into the detailed techniques for conducting sustainment operations at echelon. -
Doctrine Under Development - The following sustainment doctrinal manuals are under revision. Click here to learn more.Ongoing Updates
Doctrine Under Development
The following manuals are currently being formally staffed through the Enterprise Task Management System Solutions (ETMS2), originally known as the Task Management Tool (TMT). If you have comments, please provide them on the attached standardized comment resolution matrix to your command for consolidation before the suspense date. The use of the comment matrix is mandatory to facilitate the task of consolidating and adjudicating all comments. Please read the comment matrix primer to understand how to capture comments correctly. Provide rationale for each comment, including page, paragraph, and line number, along with suggested correction or solution. Recommend using specific line-in/line-out comments to avoiding general comments that criticize text content and provide little or no specific recommended corrections. Click here for a copy of the blank comment matrix and primer. Note: Access requires CAC credentials.
Please feel free to contact us with any questions or concerns
Thanks for your contributions to our sustainment doctrinal manuals.
Note: Access to the following draft publications requires CAC credentials.
Click Here to view Army Techniques Publication (ATP) 4-93.1 Combat Sustainment Support Battalion (Initial Draft)
Suspense 21 June 24
Click Here to view Army Techniques Publication (ATP) 4-31 Ground Equipment Battle Damage Assessment, Repair, and Recovery (Final Draft)
Suspense 16 July 24
Click Here to view Army Techniques Publication (ATP) ATP 4-98 Army Sustainment Command Operations (Final Draft)
Suspense 17 July 24
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Basic Officer Leader Course (BOLC) - Highlight Reel - Initial training at the Basic Officer Leader Course (BOLC) prepares Army Officers both physically and mentally to lead effective, successful missions. At BOLC, you'll acquire the skills and knowledge necessary to make a difference as a leader in the Army. BOLC is split into three areas: Soldier Skills, Leadership Principles, and Specialized Training. Each focusing on a different aspect of becoming an Officer.Updated on
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Lt. General Gregg: Interview with a Legend - In early 2024, former QM General and CASCOM CG, Maj. General (R) Rodney Fogg sat down with Lt. General (R) Aruthur Gregg, to capture, for posterity, his life story. This interview covered his challenges, experiences and insights that offer invaluable wisdom to the Army Sustainment community and Army leaders as a whole. Click here to view videos from the wide variety of topics Lt. General Gregg discussed.Updated on
Lt. General Gregg: Interview with a Legend
In February of 2024, Maj. General (R) Rodney Fogg sat down with Lt. General (R) Arthur Gregg to capture a comprehensive telling of his life story, for posterity and insight. General Gregg discusses his childhood and challenges growing up in the segregated south, his journey from supply clerk to becoming the first African-American Lt. General in the Army, and his legacy as he became the co-namesake for our post, Fort Gregg-Adams.
How to Watch:
The full length video can be found by clicking here.The interview is also segmented by topic into 23 parts. To view a full playlist of these parts, click here, or click any of the images below to view them individually.
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ATP 4-0.6: Sustainment Automation Support Management Office Operations - Published on 17 Jan 2024 describes the Sustainment Automation Support Management Office (SASMO) as information managers that enable knowledge management for sustainment centers of operations executing the sustainment management process. Sustainment automation support operations involve systems administration (maintaining enterprise business system applications) and network administration (maintaining the sustainment transport system). This publication shifts from a system centric to a SASMO operations focus that describes the roles, characteristics, functions, capabilities, and techniques, at echelon, that underpin the delivery of sustainment products and services employed by all four of the sustainment elements (logistics, financial management, personnel services, and health service support).Updated on
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ATP 4-33: Maintenance Operations - Published on 9 Jan 2024, this ATP provides doctrinal techniques for understanding maintenance operations at all echelons to provide the lethality and flexibility to meet operational objectives and generate combat power in support of operations. This publication describes the roles, responsibilities, functions, and processes of Army maintenance operations and explains how maintenance operations play a vital role in maintaining the force to ensure unit readiness by maintaining weapon systems and equipment in a fully mission capable status in dynamic and challenging operational environments.Updated on
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Tele-maintenance - The ASRP now houses a "Tele-maintenance" page, which is acommunications tool that allows technicians to share equipment information, and troubleshooting techniques in order to solve real time issues.Updated on
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ATP 1-0.1: Techniques for Human Resources Support to Operations - Published on 16 Nov 2023, ATP 1-0.1 provides guidance on HR actions and enables decision making in conducting HR support at the operational and tactical level in a deployed theater of operations.Updated on
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Sustaining Army 2030 White Paper - Our Army is currently executing its biggest transformation in decades, as we reorganize and modernize combat formations while re-establishing the division as the primary unit of action. Sustaining Army 2030 describes why we are transforming and how we will deliver the logistics, human resources, financial management, and health service support necessary to prolong endurance, extend operational reach, provide freedom of action, and prevail during joint all-domain operations.Updated on
Commonly Referenced Sustainment Resources
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Sustainment Force Structure Book - The Sustainment Force Structure Book is a data reference and resource that provides a snapshot of sustainment organizations by Standard Requirements Code (SRC). This snapshot includes a brief statement of the organization's mission and functions, capabilities, employment, basis of allocation, doctrinal mobility and dependencies derived from its base Table of Organization and Equipment (TOE). The information provided on sustainment organizations reflects a fully modernized and approved organizational structure for personnel and equipment. Modification Table of Organization and Equipment (MTOEs) for each organization will vary based on force management guidance and priorities.Resource Ownership: CASCOM Force Development Directorate Requires CAC credentialsAccess the Force Management System (FMSWeb) for access to Unit MTOEs. Note: Access requires CAC credentials.
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OPLOG Planner - Click to request via MS Teams. OPLOG Planner is designed to assist logistics planners in calculating supply usage estimates in support of operations. This program is specifically designed to support operations typically associated with multi-phase operation plans (OPLAN) and operation orders (OPORD).Resource Ownership: Planning Data Branch, CASCOM Requires CAC credentials
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Quick Logistics Estimation Tools - Click to request via MS Teams. Provides links to abbreviated logistics estimation spreadsheet tools for calculating initial class of supply requirements, such as required LBS, STONS, Pallets, and Platform; based on force strength, operational phase, and climate. Includes: Platform Calculator, Quick Logistics Estimation Tool, Food and Water Tool, Class III Bulk Estimation Tool, and Convoy Planning Tool.Resource Ownership: Planning Data Branch, CASCOM Requires CAC credentials
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IPPS-A Training - How-To Videos - A series of training videos which aim to relate current HR practices to IPPS-A business rules, offers translations from HR Legacy Systems to IPPS-A, provides HR professionals, commanders and managers a learning resource for their roles in IPPS-A, and demonstrates the views and methods of IPPS-A in a training database.Resource Ownership: AG School, SSI Requires CAC credentials
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The Preventive Maintenance Magazine - Informs Army and DoD readiness by emphasizing preventive maintenance and promoting proper maintenance and supply procedures (AR 700-138). Review of the magazine will be a regular part of unit readiness efforts. A reader service is available to answer maintenance and supply questions.Resource Ownership: Army Sustainment Command (ASC)
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Army OCS Resource Portal - Provides the following OCS resources: What is OCS; OCS training aids, publications, documentation, articles and more.Resource Ownership: OCS, CASCOM Requires CAC credentials
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Sustainment Training Strategy 21 - This strategy is designed to support building and assessing Large Scale Combat Operations (LSCO) sustainment unit progressive training readiness, and support Army Chief of Staff’s intent that, “We must be ready to defeat any enemy, anywhere, whenever called upon, under any condition.” The core of strategy are the three appendices, which provide a detailed description of unit training paths by echelon with emphasis on platoon level training. They contain Notional Training Path Models for “how to train” at Platoon, Company, and higher headquarters level (Battalion, Brigade, TSC, and ESC).Resource Ownership: Collective Training Requires CAC credentials
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ATP 4-91: Division Sustainment Operations - ATP 4-91 describes sustainment at echelon and provides details on sustainment organizations operating at the division echelon. It is written for commanders, staffs and Soldiers at all levels, leaders and instructors at military institutions, students, and doctrine and training developers. It provides relevant information on the capabilities of the DSB and DSB employment considerations.Resource Ownership: Doctrine
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GCSS-Army and Property Accountability - Access training resources for the GCSS-Army system, as well as important resources such as the Property Accountibility Virtual Playbook, SSA Multimedia Package, and more.Resource Ownership: Quartermaster, CASCOM
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Command Maintenance Discipline Program (CMDP) - Commanders, Staff, and Soldiers of Active, Reserve, and National Guard Component Sustainment Brigades, BSBs, TSCs, ESCs and other Sustainment and Logistics formations of the Operational Force should use the Command Maintenance Discipline Program to learn more about their role in understanding and improving readiness rates within their units and within the Generating Force.Resource Ownership: Ordnance Requires CAC credentials
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Deployer's Toolbox - The Deployer's toolbox is a collaborative effort designed to aggressively pursue improvements to the deployment processes in order to advance, standardize, implement, and maintain Army deployment readiness and capability.Resource Ownership: Transportation DPMO Requires CAC credentials