Marine Corps Warfighting Publication MCWP 3-34 (Formerly MCWP 3-17) Engineering Operations provides doctrine and supporting tactics, techniques, and procedures (TTP) for the planning and execution of engineer support to the MAGTF. This publication provides general information on the numerous capabilities engineers bring to the battle, from planning through to the execution of an operation. Engineers provide one of the most versatile resources a commander has in a MAGTF. They can provide the means to creatively apply the art and science of tactics in any situation encountered.This publication reflects the Marine Corps warfighting philosophy and explains how engineer operations contribute to our ability to wage maneuver warfare. It provides guidance for planning and coordinating engineer support and explains the unique command and support relationships of engineers. MCWP 3-34 is the lead publication in a series of engineer-related doctrinal publications. As such, it ties the specific TTP described in supporting publications with applicable engineer functions. This publication is designed primarily for engineer unit commanders, their staffs, and anyone involved in engineer planning, but is also useful to any commanders and their staffs that work with engineer units.