The purpose of this publication is to provide heavy forces fire support officers and enlisted personnel at maneuver company, battalion and brigade with a how-to manual. It focuses on fire support officers (FSOs) in mechanized infantry, armor, and task forces at brigade and below. This publication, "Tactics, Techniques, and Procedures for Fire Support for Brigade Operations (Heavy) (FM 6-20-40)," describes maneuver techniques and fire support considerations. It established responsibilities and duties of key personnel by focusing on how the fire support system can support the ground-gaining arms. Maneuver and fire support doctrine should be studied in depth to obtain a complete understanding of doctrine, tactics, and techniques. That basic understanding is a prerequisite in order to effectively apply the contents of this how-to manual. This manual is fully compatible with the Army AirLand Battle doctrine and is consistent with current joint and combined doctrine. It assumes that the user has a fundamental understanding of the fire support principles set forth in FM 6-20.