The AAV's True Successor "Amphibious Combat Vehicle"

AMPHIBIOUS COMBAT VEHICLE (ACV) FAMILY OF VEHICLES (FOV)
The ACV is the Corps’ next-generation vehicle designed to move Marines from ship to shore. The ACV is a full replacement for the aging Amphibious Assault Vehicle, the ACV will be the primary means of tactical mobility for the Marine infantry battalion at sea and ashore. The ACV will support expeditionary mobility capability and capacity with balanced levels of performance, protection, and payload. The vehicles within the ACV FoV program are a personnel carrier (ACV-P), command and control (ACV-C), a medium caliber cannon (ACV-30) and maintenance/recovery (ACV-R).

ASSAULT AMPHIBIOUS VEHICLE (AAV)
The AAV, initially fielded in 1972, remains the primary general-support armored personnel carrier for Marines. The AAV family of vehicles consists of a personnel, a command and control, and a recovery variant. The Amphibious Combat Vehicle will eventually replace the AAV family of vehicles.

Expeditionary Fighting Vehicle (EFV)
The EFV(formerly known as the Advanced Amphibious Assault Vehicle (AAAV)) was an amphibious assault vehicle developed by General Dynamics during the 1990s and 2000s for use by the U.S. Marine Corps. It would have been launched at sea, from an amphibious assault ship beyond the horizon, able to transport a full marine rifle squad to shore. It would maneuver cross country with an agility and mobility equal to or greater than the M1 Abrams.

The EFV was designed to replace the aging AAV-7A1 Assault Amphibious Vehicle (AAV), which entered service in 1972, and was the Marine Corps' number one priority ground weapon system acquisition. It was to have had three times the speed in water and about twice the armor of the AAV, as well as superior firepower. The vehicle was to be deployed in 2015;[5] however, on 6 January 2011, Secretary of Defense Robert Gates recommended the EFV program be canceled. The program, which was projected to cost $15 billion, had already cost $3 billion.

The Marines asked for the EFV to be canceled in favor of the Assault Amphibian Vehicle Service Life Extension Program and the Marine Personnel Carrier, which itself became phase one of the Amphibious Combat Vehicle.

Source: https://www.peols.marines.mil/Programs/Advanced-Amphibious-Assault/
Source: https://en.wikipedia.org/wiki/Expeditionary_Fighting_Vehicle

Видео The AAV's True Successor "Amphibious Combat Vehicle" канала United States Defense Media