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.

The United States Army sniper is a specially selected volunteer highly trained in advanced marksmanship and Fieldcraft skills. He can support special operations missions and is able to engage selected targets from concealed positions at ranges and under conditions that are not possible for the normal rifleman. The sniper's skill acts as a force multiplier, where the mission is two-fold: (1) to eliminate high-value tactical targets on the battlefield, and (2) act as observer gathering intelligence. Field Manual 23-10 provides doctrinal guidance on the mission, personnel, organization, equipment, training, skills, and employment of the Sniper. This manual is intended for use by commanders, staffs, instructors, and soldiers at training posts, United States Army