Doctrine provides a military organization with a common philosophy, a language, a purpose, and unity of effort. Tactics is the art and science of employing all available means to win battles and engagements. Specifically, it comprises the actions taken by a commander to arrange units and activities in relation to each other and the enemy. FM 3-90 introduces the basic concepts and control measures associated with the art of tactics. It cannot be read in isolation. To understand FM 3-90, the reader must understand the operational art, principles of war, and links between the operational and tactical levels of war described in FM 3-0, Operations. He should understand how the activities described in FM 3-07, Stability Operations and Support Operations, carry over and affect offensive and defensive operations and vice versa. He should understand the operations (plan, prepare, execute, and assess) process described in FM 6-0, Command and Control, and how that process relates to the military decision making process and troop-leading procedures described in FM 5-0, Army Planning and Orders Production. FM 3-90 also refers to joint publications (JPs). Reviewing referenced JPs will also aid in understanding FM 3-90. FM 3-90 focuses on the tactics used to employ available means to win in combat. Those tactics require judgment in application. The ability to seize and secure terrain, with its populations and productive capacity, distinguishes land forces conducting decisive offensive and defensive operations. FM 3-90 provides a common discussion of how commanders from the battalion task force level through the corps echelon conduct tactical offensive and defensive operations and their supporting tactical enabling operations. It is not prescriptive, but authoritative. Tactical fundamentals do not change with the fielding of each new piece of equipment. However, the integration of new equipment and organizations usually requires changes in related techniques and procedures. FM 3-90 provides guidance in the form of combat-tested concepts and ideas modified to exploit emerging Army and joint capabilities.

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.

This publication, Field Manual FM 3-98 Reconnaissance and Security Operations July 2015, provides doctrinal guidance and direction for Cavalry organizations, as well as reconnaissance and security organizations. This FM establishes the foundation for the development of tactics and procedures in subordinate doctrine publications. This publication applies across the range of military operations. While the main focus of this field manual is Cavalry formations within the units listed below, all maneuver formations must be able to conduct reconnaissance and security tasks. - Armored brigade combat team (ABCT) Cavalry squadron. - Infantry brigade combat team (IBCT) Cavalry squadron. - Stryker brigade combat team (SBCT) Cavalry squadron. - Battlefield surveillance brigade (BFSB) Cavalry squadron. - It is applicable to the- - Scout platoon of maneuver battalions. - Combat aviation brigade air squadron. The principal audiences for FM 3-98 are commanders, leaders, and staffs responsible for the planning, execution, or support of reconnaissance and security operations as well as instructors charged with teaching reconnaissance and security operations. Doctrine consists of fundamental principles that describe how to fight. At the tactical level, doctrine consists of authoritative principles concerning how to execute reconnaissance and security operations as part of Army and joint operations that require professional military judgment in their application. Importantly, our doctrine must describe how brigade combat teams (BCT) and subordinate units combine the capabilities of various arms into cohesive, combined arms, air-ground teams and provide a clear description of how to execute reconnaissance and security operations. This publication provides the commander and staff of Cavalry formations with doctrine relevant to Army and joint operations. This publication explains how effective reconnaissance and security operations generate depth, allow commanders reaction time and maneuver space, fight for information and collect information through stealth, protect against surprise, ease the forward movement of follow-on forces, and provide commanders with flexibility and adaptability. The doctrine described in this publication is applicable across unified land operations. The previous proponent manual for Cavalry Operations was FM 3-20.96, published 12 March 2010, which included operational considerations. This publication provides doctrinal guidance for all formations assigned to the ABCT, the IBCT, and SBCT. The following is a summary of each chapter in the manual: Chapter 1 addresses the role of Cavalry in unified land operations and Cavalry organizations. Chapter 2 discusses understanding the threat, potential threat groups and threat characteristics. Chapter 3 addresses the operational environment, shaping, engaging, and influencing outcomes, and consolidating gains. Chapter 4 highlights the updated concepts of mission command in relation to commander's reconnaissance and security guidance, the operations process and information collection. Chapter 5 begins with an overview, followed by a detailed discussion of the fundamentals of reconnaissance, forms of reconnaissance, and reconnaissance handover. Chapter 6 begins with an overview, followed with the fundamentals of security operations, counterreconnaissance, and the forms of security. Chapter 7 provides a short overview and then devotes a section to reconnaissance and security stability planning, stability principles and frameworks, and stability tasks. Chapter 8 describes sustainment for reconnaissance and security tasks, sustainment planning considerations for reconnaissance and security, sustainment considerations for reconnaissance and security and special sustainment consideration.

Volume 5, Deep Maneuver: Historical Case Studies of Maneuver in Large-Scale Combat Operations, presents eleven case studies from World War II through Operation Iraqi Freedom focusing on deep maneuver in terms of time, space and purpose. Deep operations require boldness and audacity, and yet carry an element of risk of overextension - especially in light of the independent factors of geography and weather that are ever-present. As a result, the case studies address not only successes, but also failure and shortfalls that result when conducting deep operations. The final two chapters address these considerations for future Deep Maneuver.

The official United States Army manual, U.S. Army Reconnaissance and Surveillance Handbook provides tactics, techniques, and procedures for reconnaissance and surveillance planning, mission management, and reporting. Throughout history, military leaders have recognized the importance of reconnaissance and surveillance. Gaining and maintaining contact with the enemy is essential to win the battle, and U.S. military history contains many examples where our knowledge of the enemy, or lack of knowledge, directly led to victory or defeat. The role of reconnaissance and surveillance has not diminished on the modern battlefield; if anything, it has become even more important. Battles at the combat training centers prove that a good reconnaissance and surveillance effort is critical to successful attacks. On the other hand, a poor reconnaissance and surveillance effort almost guarantees defeat for the commander. The message is clear: success on the battlefield begins with reconnaissance and surveillance. This essential handbook covers: Surveillance Preparation Assets Equipment Planning Monitoring Organizing Missions Electronic warfare Counter-reconnaissance And more! It also looks at the development of intelligence, employment considerations for reconnaissance, and defines the roles of various personnel in planning operations. Intended for maneuver commanders and their staffs; intelligence staffs and collection managers; and other personnel involved in planning and reconnaissance and counter-reconnaissance operations, and now available to everyone, U.S. Army Reconnaissance and Surveillance Handbook provides an insider’s look into the world of Army intelligence.