This Army tactics, techniques, and procedures (ATTP) publication, "Commander and Staff Officer Guide," 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.