Book excerpt: This manual, Marine Corp Tactical Publication MCTP 3-40H MAGTF Supply Operations August 2019, provides guidance governing the principles and concepts of supply as well as the organization, integration, planning, and execution of Marine air-ground task force supply support in an expeditionary operating environment. This publication also provides essential information concerning supply sources and options capable of supporting all phases of operations.This publication is primarily intended for commanders and their staffs to expand their knowledge and understanding of the supply process and how it meets expeditionary force requirements. It concentrates on ground and aviation supply support necessary to sustain Marine Corps expeditionary operations.