FM 3-34 is the Army doctrine publication that presents the overarching doctrinal guidance and direction for conducting engineer activities and shows how it contributes to decisive action. It provides a common framework and language for engineer support to operations and constitutes the doctrinal foundation for developing other fundamentals and tactics, techniques, and procedures detailed in subordinate doctrine manuals. This manual is a key integrating publication that links the doctrine for the Engineer Regiment with Army capstone doctrine and joint doctrine. It focuses on synchronizing and coordinating the diverse range of capabilities in the Engineer Regiment to support the Army and its mission successfully. FM 3-34 provides operational guidance for engineer commanders and trainers at all echelons and forms the foundation for United States (U.S.) Army Engineer School curricula.