This USMC manual, Marine Corps Warfighting Publication MCWP 3-34 Engineering Operations December 2023, addresses the fundamental principles required for planning, executing, and assessing Marine air-ground task force engineering operations. It provides a broad overview for commanders and their staffs on engineer support tasks and functions related to expeditionary advanced base and distributed maritime operations. Additionally, it provides the reader with a conceptual understanding of engineer capabilities, planning considerations, command relationships, support requirements, and considerations for the successful execution of missions throughout the competition continuum. It is the pinnacle of engineer doctrine and links directly with all other Marine Corps engineer doctrinal publications and Joint Publication 3-34, Joint Engineer Operations.