Field manual 3-90.6 provides the commander and staff of the Brigade Combat Team (BCT) and subordinate units with doctrine relevant to Army and joint operations. It applies to the Heavy Brigade Combat Team (HBCT), the Infantry Brigade Combat Team (IBCT), and the Stryker Brigade Combat Team (SBCT). The doctrine described in this manual applies across the full spectrum of military operations - offense, defense, stability or civil support. This publication: Provides BCTs with a framework in which they can operate as part of a division or independently as part of a joint task force; Provides doctrine for BCT commanders, staffs, and their subordinate commanders and leaders responsible for conducting major activities performed during operations; Serves as an authoritative reference for personnel who: Develop doctrine (fundamental principles and tactics, techniques, and procedures), materiel, and force structure; Develop institution and unit training; Develop unit tactical standard operating procedures for BCT operations.