The EFV (Expeditionary Fighting Vehicle) is a cancelled development aimed at replacing the AAV-7A1 as the Marine Corps’ primary combat vehicle for transporting troops on land and from ship to shore. In addition to its higher land and water speeds, the revised EFV had sufficient ballistic protection to defeat rounds up to 14.5mm or fragments from 155mm artillery shells. It also had improved mine-blast protection and a nuclear, chemical and biological (NBC) defense system. This combination of features alone would have provided enhanced survivability compared to the Amphibious Assault Vehicle.