This publication, Army Techniques Publication ATP 4-91 Army Field Support Brigade Change 2 July 2014, is a major revision to ATP 4-91. It provides basic doctrinal discussion on the organization and operations of the Army Field Support Brigade. The primary target audience for this field manual includes: Headquarters Department of the Army, Army commands, theater armies, direct reporting units, and supported units at all levels. The Army Field Support Brigade (AFSB) is a small, mission focused, highly modular organization built around a tailored modified table of organization and equipment (MTOE) and an augmentation table of distribution and allowances (TDA) structure. The AFSB is assigned to the US Army Materiel Command's (USAMC) Army Sustainment Command (ASC). AFSBs leverage USAMC national-level provider capabilities and assist in the coordination of acquisition logistics and technology (ALT) support (less medical) to the operational Army. Each AFSB can request assistance and/or support from USAMC and the Assistant Secretary of the Army for Acquisition, Logistics and Technology (ASA ALT]) to meet specific mission requirements. When deployed in support of contingency operations, and when directed by their higher echelon, the AFSB will normally be placed under the operational control (OPCON) of the supported theater Army. This OPCON authority is normally delegated to the theater sustainment command (TSC) or expeditionary sustainment command (ESC) as appropriate. The AFSB combines various USAMC assets into a single brigade level unit that plans for and synchronizes USAMC national-level provider support to US Army forces. The AFSB also participates in the coordination and support of ALT related actions, less medical ALT support and theater support contracting, in the operational area. Although the AFSB has no direct acquisition authority, it is able to coordinate with and influence program executive office (PEO), project/product managers (PMs), or Army Test and Evaluation Command (ATEC) actions. This ATP provides an overview of AFSB organization and mission functions that apply to both contingency operations and support to units throughout the Army force generation (ARFORGEN) process. This version, Change 2, includes five chapters and two appendix: Chapter 1 - Operations and Organization Overview Chapter 2 - Subordinate Organizations Chapter 3 - National-Level Provider Functions Chapter 4 - Acquisition Logistics and Technology Chapter 5 - Contract Support Coordination and Contractor Management Appendix A - Responsible Reset Task Force (R2TF) and Redistribution Property Assistance Team (RPAT) Techniques