This Army tactics, techniques, and procedures (ATTP) reinforces the fundamentals of mission command established in field manual (FM) 3-0, Operations; FM 5-0, The Operations Process; and FM 6-0, Mission Command. Whereas the above manuals focus on the fundamentals of mission command, this manual provides commanders and staff officers with tactics, techniques, and procedures (TTP) essential for the exercise of mission command. This is a new Army publication. It includes many of the appendices currently found in FM 5-0 and FM 6-0 that addressed the "how to" of mission command. By consolidating this material into a single publication, Army leaders now have a single reference to assist them with TTP associated with planning, preparing for, executing, and continually assessing operations. This ATTP also enables the Army to better focus the material in future editions of FMs 5-0 and 6-0 on the fundamentals of the operations process and mission command, respectively. This ATTP consist of 12 chapters and 26 annexes. It incorporates the new mission command taxonomy established in FM 3-0. -Chapter 1 provides an overview of mission command. It summarizes the new mission command taxonomy established in change 1 to FM 3-0 (2011). -Chapter 2 addresses the staff to include staff organization and the duties and responsibilities of individual staff officers. It updates FM 6-0. -Chapter 3 describes how commanders cross-functionally organize their staff into command posts and offers TTP for command post operations. It updates FM 5-0. -Chapter 4 describes the military decision making process. It updates FM 5-0. -Chapter 5 addresses troop leading procedures-a framework for planning and preparing for operations used by small unit leaders. It updates FM 5-0. -Chapter 6 addresses how the commander and staff build and maintain running estimates throughout the operations process. This updates FM 5-0. -Chapter 7 provides guidelines to assist commanders and staffs to develop formal assessment plans. This updates FM 5-0. -Chapter 8 discusses rehearsal types and techniques. This updates FM 5-0. -Chapter 9 discusses liaison principles and the responsibilities of liaison officers and teams. This updates FM 6-0. -Chapter 10 provides guidance and formats for military briefings. This updates FM 5-0. -Chapter 11 discusses how to prepare staff studies and decision papers, and provides formats for both. This updates FM 5-0. -Chapter 12 offers guidelines and provides formats and instruction for building effective plans and orders. This updates FM 5-0. -The annexes provide formats and instructions for developing attachments to the base plan or order. The sequence of these annexes corresponds to the Army operation order attachment structure. These formats and instructions are new to Army doctrine. This ATTP 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. While this ATTP applies to all Army leaders, the primary audience is the commander and the staff. Headquarters, U.S. Army Training and Doctrine Command, is the proponent for this publication. The preparing agency is the Combined Arms Doctrine Directorate, U.S. Army Combined Arms Center.