the Army had ordered 135 tanks re-built to new standards, with employment at over 500 workers and expected to rise to 1,000. Future plans During the 1980s and 1990s, the Block III main battle tank from the Armored Systems Modernization (ASM) program was expected to succeed the M1 Abrams family in the 1990s. The design had an unmanned turret with a 140 mm main gun, as well as improved protection. The end of Cold War hostilities caused the end of the program. The tracked M8 Armored Gun System was conceived as a possible supplement for the Abrams in U.S. service for low-intensity conflict in the early 1990s. Prototypes were made but the program was canceled. The eight-wheeled M1128 Mobile Gun System was designed to supplement the Abrams in U.S. service for low-intensity conflicts. It has been introduced into service and serves with Stryker brigades. The Future Combat Systems XM1202 Mounted Combat System was to replace the Abrams in U.S. Army service and was in development when funding for the program was cut from the DoD's budget in 2010. Engineering Change Proposal 1 is a two-part upgrade process. ECP1A adds space, weight, and power improvements and active protection against improvised explosive devices. Nine ECP1A prototypes have been produced as of October 2014. ECP1B, which will begin development in 2015, may include sensor upgrades and the convergence of several tank round capabilities into a multi-purpose round. In 2011 the Army anticipated that the remaining M1A1 fleet will remain in U.S. service until at least 2021, and the M1A2 to beyond 2050. The United States Army National Guard will continue using M1A1s for a lengthier, undetermined period; it took until 1997 for the M60A3 to be retired by the last National Guard units, as opposed to the active-duty U.S. Army, which had fully transitioned to the M1 by the end of 1990. As of 2020, the Marine Corps has been pursuing a force restructuring plan named Force Design 2030. Under this program, all US Marine tank battalions were deactivated and its M1A1 tanks transferred to the Army by the end of 2021. In the future, any need the Marine Corps encounters for heavy armor will be met by the U.S. Army. The U.S. Army is evaluating a replacement for the M1 Abrams as part of the Next Generation Combat Vehicle (NGCV) program, notionally known as the Decisive Lethality Platform (DLP). Design Countermeasures Camouflage