Marine Corps Warfighting Publication (MCWP) 3-13, Employment of Amphibious Assault Vehicles, provides the doctrinal basis for the use of amphibious assault vehicles (AAVs) in support of Marine air-ground task force (MAGTF) operations. This publication addresses the mechanized capability of the assault amphibian unit, section, and platoon in support of MAGTF missions. These missions include seizure and defense of naval and air bases, conduct of land operations essential to naval operations, and sustained operations ashore that support joint or combined force land operations.