Doctrine provides a military organization with unity of effort and a common philosophy, language, and purpose. This manual discusses the organization and operations of the theater army headquarters, including its role as the Army Service component command (ASCC) to the geographic combatant commander (GCC) and the relationships between the theater army headquarters and the theater enabling commands. The manual also discusses theater army responsibilities for setting the theater, Title 10 functions and responsibilities, generally referred to as the combatant commander's daily operations requirements, as well as the operational employment of the theater army's contingency command post (CCP) to directly mission command limited types of operations.FM 3-93 serves as a guide for organizing the theater army headquarters and its command posts, for training the staff, and conducting operations as directed by the combatant commander.FM 3-93 has sixteen chapters and one appendix.• Chapter 1 discusses the theater army's role as the ASCC and the joint context in which it operates. It discusses the theater army's responsibilities to support the combatant commander's theater campaign plan across the GCC's area of responsibility (AOR), referred to as the theater army's AOR-wide support responsibilities. It also discusses the theater army's role in theater opening, including reception, staging, onward movement, and integration (RSOI) of Army and joint forces provided to the joint force commander (JFC) in joint operations areas (JOA) opened within the AOR, and the theater army's dominant role in sustaining Army and joint forces, as directed, across the AOR. Chapter 1 also discusses the sustainment concept of support and the modification of responsibilities of the Army forces commander (ARFOR) within the JOA. Finally, Chapter 1 discusses the theater enabling commands (intelligence, sustainment, medical, signal, and aviation) and their command or support relationships with theater army and the ARFOR operating in JOAs within the AOR.• Chapter 2 discusses how the theater army employs its CCP to support joint and combined training exercises and other theater security cooperation activities. It also discusses the direct mission command of limited (scale and scope) military operations within the AOR.• Chapter 3 discusses the organization and functions of the theater army's main command post.• Chapter 4 discusses the organization and functions of the theater army's CCP.• Chapter 5 discusses the organization and functions of the headquarters and headquarters battalion, which provides administrative and sustainment support to the theater army headquarters staff.• Chapters 6 through 14 discuss the organization and functions of the theater army command group, personal and special staff, and the warfighting functional cells (intelligence, movement and maneuver, fires, protection, sustainment, and mission command).• Chapter 15 discusses the organization and functions of the theater army CCP, and its capabilities, limitations, and dependencies.• Chapter 16 discusses the organization and functions of the theater army headquarters and headquarters battalion (HHB), including HHB sustainment support for the CCP when it deploys.• The appendix explains doctrinal command and support relationships, and lists the Army Title 10 responsibilities. Tables A-1 through A-35 illustrate Army support to other Services and executive agent responsibilities. Although these responsibilities may be changed or amended over time, assignment of Service responsibility is based on the Service's capabilities. Thus, changes in lead Service responsibilities are infrequent.

Field Manual FM 3-94 Theater Army, Corps, and Division Operations April 2014 provides Army doctrine for the theater army, corps, and division. FM 3-94 explains the organization of the theater army, corps, and division headquarters and their respective command posts. It establishes the roles for each headquarters, including their respective contributions to joint operations. It discusses subordinate units and each headquarters' organization of its units, establishment of command and support relationships, and conduct of operations. The principal audience for FM 3-94 is theater army, corps, and division commanders and staffs. It also provides relevant information regarding the organization and operations for commanders and staffs at field army, subordinate theater-level commands and brigades, geographic combatant commands, and other Service headquarters. FM 3-94 uses joint terms where applicable. Selected joint and Army terms and definitions appear in both the glossary and the text. The term for which FM 3-94 is proponent is marked with an asterisk in the glossary. Its definition is boldfaced in the text. For other terms and definitions shown in the text, the term is italicized and the number of the proponent publication follows the definition. FM 3-94 applies to the Active Army, Army National Guard/Army National Guard of the United States, and United States Army Reserve unless otherwise stated. FM 3-94 has seven chapters organized under three parts. Part One describes the Army hierarchy within a geographic combatant command and goes into detail about the theater army, the senior echelon in each geographic combatant command. It includes three chapters. Chapter 1 provides an overview of the higher echelons of the Army. It introduces the three senior echelons of the Army within a geographic combatant command. It describes their roles and tasks in general terms. It lays out the Army concept of sustainment and support provided by theater army. This chapter also discusses operational and administrative chains of command and their differences. The chapter concludes with a brief review of operational areas. Chapter 2 describes the roles and tasks of the theater army. It discusses the staff organization of the theater army. It also discusses the main command post and contingency command post of the theater army and their employment by the theater army commander. Chapter 3 summarizes the theater-level commands and supporting organizations that allow the theater army to fulfill its roles and enable the corps and division to accomplish theirs. Part Two discusses the corps and includes two chapters. Chapter 4 explains the roles and tasks of the corps, together with its operational and administrative responsibilities. The chapter summarizes the subordinate units typically found in the corps echelon. The chapter then discusses the internal organization of the corps and the various command posts available to the corps commander. Chapter 5 examines corps-level operations. This includes how the corps arranges its combat power, organizes the area of operations, and conducts decisive action. Part Three addresses the division in two chapters. Chapter 6 explains the roles and tasks of the division headquarters, together with its operational and administrative responsibilities. The chapter summarizes the subordinate units normally under the operational or tactical control of the division. The chapter then discusses the internal organization of the division headquarters and the various command posts available to the division commander. Chapter 7 examines division-level operations. This includes how the division arranges its combat power, organizes the area of operations, and conducts decisive action.

Doctrine provides a military organization with unity of effort and a common philosophy, language, and purpose. This manual, "Theater Army Operations" (FM3-93), discusses the organization and operations of the theater army headquarters, including its role as the Army Service component command (ASCC) to the geographic combatant commander (GCC) and the relationships between the theater army headquarters and the theater enabling commands. The manual also discusses theater army responsibilities for setting the theater, Title 10 functions and responsibilities, generally referred to as the combatant commander's daily operations requirements, as well as the operational employment of the theater army's contingency command post (CCP) to directly mission command limited types of operations.

FM 3-0 establishes the United States Army's keystone doctrine for full spectrum operations. The doctrine holds warfighting as the Army's primary focus and recognizes that the ability of Army forces to dominate land warfare also provides the ability to dominate any situation in military operations other than war. The foundation of FM 3-0 is built upon global strategic responsiveness for prompt, sustained Army force operations on land as a member of a joint or multinational force. FM 3-0 is compatible with joint doctrine. It provides overarching doctrinal direction for the conduct of full spectrum operations detailed in other Army manuals. As the Army's principal tool for professional education in the art and the science of war, FM 3-0 presents a stable body of operational doctrine rooted in actual military experience. FM 3-0 provides a foundation for the development of tactics, techniques, and procedures. SCOPE: FM 3-0 is divided into four parts. Part One (Chapters 1-3) discusses the Army's role in peace, conflict, and war. Part Two (Chapters 4-6) discusses the fundamentals of full spectrum operations, battle command, and the operations process. Part Three (Chapters 7-10) discusses the four types of Army operations: offensive, defensive, stability, and support. Part Four (Chapters 11 and 12) discusses information superiority and combat service support as enabling operations. APPLICABILITY: FM 3-0 provides operational guidance for commanders and trainers at all echelons and forms the foundation for curricula within the Army Education System. Its audience is broad, from battalion through corps to other operational-level organizations. Officers and senior non-commissioned officers must read and understand FM 3-0.

This publication, Field Manual FM 3-0 Operations Change 1 6 December 2017, describes how Army forces, as part of a joint team, shape operational environments (OEs), prevent conflict, conduct large-scale ground combat, and consolidate gains against a peer threat. This manual provides a foundation for how Army forces conduct prompt and sustained large-scale combat operations. FM 3-0 is applicable to all members of the Army Profession: leaders, Soldiers, and Army Civilians. The principle audience for FM 3-0 is commanders, staffs, and leaders. This manual also provides the foundation for training and Army education system curricula and future capabilities development. FM 3-0 contains fundamentals, tactics, and techniques focused on fighting and winning large-scale combat operations. This manual uses historical vignettes, quotes, and graphics to reinforce the doctrine within. FM 3-0 contains 8 chapters and 2 appendixes: Chapter 1 describes large-scale combat operations and associated challenges Army forces face today. It addresses anticipated OEs, threats, joint operations, and the Army's strategic roles in support of joint operations. The chapter then discusses unified land operations and associated topics, including decisive action, operational art, and the operational framework. Chapter 2 is divided into four sections. Section I provides an overview of Army echelons, capabilities, and training. Section II provides a general discussion of Army forces in a theater. Section III describes Army capabilities by warfighting function. Section IV addresses training for large-scale ground combat. Chapter 3 provides an overview of operations to shape the OE. It discusses operation assessments and describes threat activities prior to armed conflict. A discussion of shaping activities performed by Army forces follows. The chapter then describes Army organizations and their roles as they shape the OE. Chapter 4 provides an overview of operations to prevent conflict. It addresses assessing OEs in which Army forces conduct activities to prevent war during crisis action, and it provides a description of threats. The chapter continues with a discussion of the major activities within operations to prevent. The chapter concludes with the roles of the theater army, corps, divisions, and brigades. Chapter 5 is divided into four sections. Section I provides an overview of large-scale combat operations. Section II addresses tactical enabling tasks that apply to both the defense and the offense. Section III provides a discussion of forcible entry operations from which Army forces may defend or continue the offense. Section IV discusses the transition to consolidation of gains. Chapter 6 begins with a general discussion of the defense, followed by a discussion of how an enemy may attack. It continues with sections on planning and preparing corps and division defenses. It then addresses the three primary defensive tasks. Chapter 7 begins with a general discussion of the offense, followed by a discussion of how an enemy may defend. It continues with a section on how corps and divisions plan for the offense. This chapter then provides +a discussion of forms of maneuver and the four offensive tasks. The chapter concludes with a discussion on the subordinate forms of attack. Chapter 8 expands upon operations to consolidate gains discussed in previous chapters. It describes how Army forces transition from large-scale ground combat operations to operations that translate tactical and operational success into lasting gains. An expanded description of the operational framework and the consolidation area follows. The chapter concludes with a description of consolidation activities. Appendix A provides doctrine on command and support relationships that form the basis for unity of command and unity of effort. Appendix B provides commanders with a listing of risk considerations for the planning of large-scale ground combat.

This US Army field manual, Field Manual FM 3-0 Operations October 2017, is applicable to all members of the Army Profession: leaders, Soldiers, and Army Civilians. The principle audience for FM 3-0 is commanders, staffs, and leaders of theater armies, corps, divisions, and brigades. This manual also provides the foundation for training and Army education system curricula and future capabilities development across doctrine, organization, training, materiel, leadership and education, personnel, and facilities (known as DOTMLPF). FM 3-0 applies to the Active Army, the Army National Guard/Army National Guard of the United States, and the United States Army Reserve unless otherwise stated. Today's operational environment presents threats to the Army and joint force that are significantly more dangerous in terms of capability and magnitude than those we faced in Iraq and Afghanistan. Major regional powers like Russia, China, Iran, and North Korea are actively seeking to gain strategic positional advantage. These nations, and other adversaries, are fielding capabilities to deny long-held U.S. freedom of action in the air, land, maritime, space, and cyberspace domains and reduce U.S. influence in critical areas of the world. In some contexts they already have overmatch or parity, a challenge the joint force has not faced in twenty-five years. The proliferation of advanced technologies; adversary emphasis on force training, modernization, and professionalization; the rise of revisionist, revanchist, and extremist ideologies; and the ever increasing speed of human interaction makes large-scale ground combat more lethal, and more likely, than it has been in a generation. As the Army and the joint force focused on counter-insurgency and counter-terrorism at the expense of other capabilities, our adversaries watched, learned, adapted, modernized and devised strategies that put us at a position of relative disadvantage in places where we may be required to fight. The Army and joint force must adapt and prepare for large-scale combat operations in highly contested, lethal environments where enemies employ potent long range fires and other capabilities that rival or surpass our own. The risk of inaction is great; the less prepared we are to meet these challenges, the greater the likelihood for conflict with those who seek windows of opportunity to exploit. The reduction of friendly, forward-stationed forces, significant reductions in capability and capacity across the entire joint force, and the pace of modernization make it imperative that we do everything possible to prepare for worst-case scenarios. We must be ready to win with the forces we have, and having the right doctrine is a critical part of that readiness. FM 3-0 provides a doctrinal approach for our theater armies, corps, divisions and brigades to address the challenges of shaping operational environments, preventing conflict, prevailing during large-scale ground combat, and consolidating gains to follow through on tactical success. FM 3-0 is about how we deter adversaries and fight a peer threat today, with today's forces and today's capabilities. It addresses operations to counter threats in three broad contexts that account for what the Nation asks its Army to do. Two chapters describe operations to defeat aggression by subversion of U.S. partners and interests, which is fundamental to winning short of war. Three chapters describe operations to defeat enemies during large-scale ground combat operations, which is fundamental to winning wars. The final chapter describes operations to complete the tasks necessary to ensure enduring outcomes, which is fundamental to achieving the ultimate strategic purpose of employing Army forces.

*This publication supersede FM 3-14, dated 19 August 2014. Field manual (FM) 3-14, Army Space Operations, provides an overview of space operations in the Army and is consistent and compatible with joint doctrine. FM 3-14 links Army space operations doctrine to joint space operations doctrine as expressed in joint publication (JP) 3-14, Space Operations and other joint doctrinal publications. This FM establishes guidance for employing space and space-based systems and capabilities to support U.S. Army land warfighting dominance. It provides a general overview of overhead support to Army operations, reviews national guidance and direction, and outlines selected unique space-related Army capabilities. The doctrine in this FM represents the Army's best use of its space capabilities. This manual also contains tactics and procedures outlining how to plan, integrate, and execute Army space operations. The principal audience for FM 3-14 encompasses all members of the Army profession, including Army commanders and staffs, to assist in the planning and incorporation of space capabilities into operations. It will aid Army and joint force commanders in planning and executing cohesive joint operations throughout the entire operational environment. Commanders and staffs of Army headquarters serving as joint task force or multinational headquarters should also refer to applicable joint or multinational doctrine concerning the range of military operations and joint or multinational forces. Trainers and educators throughout the Army may also use this manual.