On January 6, 2011, after spending approximately $3 billion in developmental funding, the Marine Corps—with "encouragement" from DOD—cancelled the Expeditionary Fighting Vehicle (EFV) program. The EFV was intended to replace the 40-year-old Amphibious Assault Vehicle (AAV), which currently transports Marines from ships to shore under hostile conditions. The Marine Corps cancelled the EFV due to excessive cost growth and poor performance in operational testing. Recognizing the need to replace the AAV, the Pentagon pledged to move quickly to develop a "more affordable and sustainable" vehicle to take the place of the EFV. The Amphibious Combat Vehicle (ACV) is intended to replace the AAV, incorporating some EFV capabilities but in a more practical and cost-efficient manner. In concert with the ACV, the Marines were developing the Marine Personnel Carrier (MPC) to serve as a survivable and mobile platform to transport Marines when ashore. The MPC was not intended to be amphibious like an AAV, EFV, or the ACV but instead would be required to have a swim capability for inland waterways such as rivers, lakes, and other water obstacles such as shore-to-shore operations in the littorals. In June 2013, citing budgetary pressures, the Marines reportedly put the MPC program "on ice" and suggested that it might not be resurrected for about 10 years. To counter this, the Navy is developing the Expeditionary Advance Base Operations (EABO) operational concept to address these concerns. MPC Becomes ACV 1.115

In what was described as a "drastic shift," the Marines decided in March 2014 to "resurrect" the MPC and designate it as ACV Increment 1.1 and initially acquire about 200 vehicles. The Marines also plan to develop ACV Increment 1.2, a tracked version, and to acquire about 470 vehicles and fund an ongoing high water speed study. Although ACV Increment 1.1 will have a swim capability, a connector will be required to get the vehicles from ship to shore. Marines Release Draft Request for Proposal (RFP) for ACV Increment 1.120

On November 5, 2014, the Marines reportedly released a draft RFP for ACV Increment 1.1. Marines Award ACV 1.1 Contracts26

On November 24, 2015, the Marine Corps awarded BAE Systems and SAIC contracts to develop ACV 1.1 prototypes for evaluation. BAE's contract was for $103.8 million and SAIC's for $121.5 million, and each company is to build 16 prototypes. Marine Corps Down Select Final Proposals32

In early December 2017, the Marines reportedly sent the ACV 1.1 down select request for proposals to BAE and SAIC. BAE Wins ACV Competition38

On June 19, 2018, the Marine Corps selected BAE Systems to produce the ACV. Reportedly, the initial contract—valued at $198 million—will be for low-rate production of 30 vehicles to be delivered by the autumn of 2019. ACV 1.1 and ACV 1.2 Consolidated44

On April 10, 2019, during testimony to the Subcommittee on Seapower of the Senate Armed Services Committee, Navy and Marine Corps leadership noted
During the fall of 2018, ACV 1.1 prototypes demonstrated satisfactory water mobility performance in high surf conditions, and in doing so met the full water mobility transition requirement for ACV 1.2 capability. ACV 2.0 is planned to be capable of operating on land alongside tanks and light armored vehicles. Potential Issues for Congress

		The Consolidation of the ACV 1.1 and ACV 1.2 Programs

While from an overall programmatic perspective, the consolidation of the ACV 1.1 and ACV 1.2 variants could be viewed as a favourable programmatic outcome, there are likely ramifications that might be of interest to policymakers.
On January 6, 2011, after spending approximately $3 billion in developmental funding, the Marine Corps cancelled the Expeditionary Fighting Vehicle (EFV) program due to poor reliability demonstrated during operational testing and excessive cost growth. Because the EFV was intended to replace the 40-year-old Amphibious Assault Vehicle (AAV), the Pentagon pledged to move quickly to develop a "more affordable and sustainable" vehicle to replace the EFV. The Amphibious Combat Vehicle (ACV) is intended to replace the AAV, incorporating some EFV capabilities but in a more practical and cost-efficient manner. In concert with the ACV, the Marines were developing the Marine Personnel Carrier (MPC) to serve as a survivable and mobile platform to transport Marines when ashore. The MPC was not intended to be amphibious like an AAV, EFV, or the ACV but instead would be required to have a swim capability for inland waterways such as rivers, lakes, and other water obstacles such as shore-to-shore operations in the littorals. Both vehicles were intended to play central roles in future Marine amphibious operations. On June 14, 2013, Marine leadership put the MPC program "on ice" due to budgetary pressures but suggested the program might be resurrected some 10 years down the road when budgetary resources might be more favorable.
In what was described as a "drastic shift," the Marines decided to "resurrect" the MPC in March 2014. The Marines designated the MPC as ACV Increment 1.1 and planned to acquire about 200 vehicles. The Marines also plan to develop ACV Increment 1.2, a tracked, fully amphibious version, and at the time planned to acquire about 470 vehicles and fund an ongoing high water speed study. Although ACV Increment 1.1 is to have a swim capability, another mode of transport (ship or aircraft) would be required to get the vehicles from ship to shore. The Marines are reportedly exploring the possibility of developing a high water speed ACV 2.0, which could accompany tanks and light armored vehicles into combat.
On November 5, 2014, the Marines released a draft Request for Proposal (RFP) for ACV Increment 1.1. On November 24, 2015, the Marine Corps awarded BAE Systems and SAIC contracts to develop ACV 1.1 prototypes for evaluation. BAE's contract was for $103.8 million and SAIC's for $121.5 million, and each company was to build 16 prototypes to be tested over the next two years. Both BAE and SAIC delivered their prototypes early, and Engineering and Manufacturing Development (EMD) testing began mid-March 2017. In early December 2017, the Marines reportedly sent the ACV 1.1 down select request for proposals to BAE and Science Applications International Corporation (SAIC).
On June 19, 2018, the Marine Corps selected BAE Systems to produce the ACV. The initial contract—valued at $198 million—was for low-rate production of 30 vehicles to be delivered by the autumn of 2019. On April 10, 2019, during testimony to the Senate Armed Services Committee, Navy and Marine Corps leadership announced that during the fall of 2018, ACV 1.1 prototypes demonstrated satisfactory water mobility performance in high surf conditions and, in doing so, met the full water mobility transition requirement for ACV 1.2 capability. As a result, ACV 1.1 and ACV 1.2 were to be consolidated into a single variant—the ACV—which is intended to replace all AAVs.
Potential issues for Congress include the potential ramifications of the consolidation of the ACV 1.1 and ACV 1.2 programs and how the possible adoption of the Expeditionary Advance Base Operations (EABO) operational concept could affect the ACV program.