This publication, Army Techniques Publication ATP 4-90 Brigade Support Battalion April 2014, describes the brigade support battalion (BSB) role, organization and operations in support of a brigade combat team (BCT) or support brigade. ATP 4-90 is a revision of FM 4-90, Brigade Support Battalion, last published in 2010. This ATP was written for commanders, staffs and Soldiers assigned to a brigade support battalion, the brigade combat team and the support brigades. It provides relevant information to echelon above brigade sustainment organizations. ATP 4-90 provides information on the role and functions of each organization within the BSB. ATP 4-90 clarifies existing BSB doctrine. The intent is to frame the BSB in the context of its role within its supported brigade as opposed to its role within the sustainment system. This is accomplished by eliminating discussion about modular logistics and focusing on BSB operations. The updates to ATP 4-90 account for mission command philosophy, emerging Army vision and implementation of Global Combat Support System-Army Field/Tactical (GCSS-Army (F/T). Language and content of the manual are consistent with current doctrine guidelines. This is primarily accomplished by removing functional details from the chapters describing the subordinate companies and referring the reader to the appropriate functional ATP. Organization graphics are updated with known organizational changes and GCSS-Army (F/T) operations are annotated where appropriate. The aviation support battalion's role, organization and operations are consolidated into a single chapter. All text related to mission command warfighting functions and log reporting is consolidated into a single chapter which includes an expanded section on mission command systems and command post (CP) operations. There are three appendices: an echelon of support appendix, a brigade support area (BSA) appendix and a current Stryker brigade combat team appendix. Army Techniques Publication ATP 4-90 Brigade Support Battalion April 2014 contains eight chapters: Chapter 1 includes the role of the BSB, how the BSB supports the sustainment warfighting function and decisive action tasks. The chapter also includes BSB concept of support and descriptions of echelon above brigade units that would support the BSB and the BSB supported brigades. Chapter 2 lists the battalions' capabilities and BSB headquarters and staff organization. Of note are the duties of specific staff elements and how they integrate with the supported brigade's staff. There is also a section on how the BSB fits within its supported brigade. Section four includes the battlefield surveillance brigade's (BFSB) brigade support company role, organization and operations. Chapter 3 provides an overview of the distribution company and includes recent capability updates. Chapter 4 is about the field maintenance company. Chapter 5 describes the brigade support medical company (BSMC) and includes the BSMC's role, organization graphic and BSMC operations. Chapter 6 provides the role, organization and operations of the aviation support battalion (ASB). The ASB is both structured differently and operates differently from the BSB. Chapter 7 is about the forward support company (FSC). The chapter identifies the role of the FSC, the FSC organization and describes what the FSC does. The chapter also includes a discussion of the FSC commander's role and command relationship between the FSC, the BSB and the supported battalion. Chapter 8 is mission command and logistic reporting. The content includes operations process, command post operations, mission command systems available to accomplish logistic reporting and a section on logistic reporting.