This United States Marine Corps USMC manual, Marine Corps Tactical Publication MCTP 3-03A Marine Air-Ground Task Force Civil-Military Operations October 2023, provides the guidance, framework, and methods for the commander to engage with the civil dimension across the competition continuum. This enables the commander to both minimize the impact of Marine air-ground task force (MAGTF) operations on the civilian population, as well as minimize the impact of the civilian population on MAGTF operations. This publication's key audience is the MAGTF commander and staff ranging from the Marine expeditionary force to the Marine expeditionary unit, as well as infantry regiments and battalions. This MCTP enables commander's and staff to integrate the civil dimension of the operating environment into operational planning and execution in order to fulfill legal and moral requirements in the modern, complex operating environment. Marine Corps leaders at every level should understand the concepts and employment considerations for both civil-military operations and civil affairs described in this publication.