The resulting design, the MBT-70, incorporated new technologies across the board.

The overall goal was to have a single new design with improved firepower to handle new Soviet tanks like the T-62, while providing improved protection against the T-62's new 115 mm smoothbore gun and especially high-explosive anti-tank (HEAT) rounds. Through the 1960s the US Army and Bundeswehr had collaborated on a single design that would replace both the M60 tank and the Leopard 1. service, while Iraqi Abrams tanks have seen action in the war against the Islamic State and have seen use by Saudi Arabia during the Yemeni Civil War. The Abrams was first used in combat in the Gulf War and has seen combat in both the War in Afghanistan and Iraq War under U.S. The export version is used by the armies of Egypt, Kuwait, Saudi Arabia, Australia, Poland and Iraq. The M1 Abrams entered service in 1980 and serves as the main battle tank of the United States Army and formerly of the United States Marine Corps (USMC). Army service by the XM1202 Mounted Combat System, but since that project was cancelled, the Army has opted to continue maintaining and operating the M1 series for the foreseeable future by upgrading with improved optics, armor, and firepower. There are three main operational Abrams versions, the M1, M1A1, and M1A2, with each new iteration seeing improvements in armament, protection, and electronics. The M1 Abrams was developed from the failed MBT-70 project that intended to replace the obsolete M60 tank. Initial models of the M1 were armed with a 105 mm M68 gun, while later variants feature a license-produced Rheinmetall 120 mm L/44 designated M256. Conceived for modern armored ground warfare and now one of the heaviest tanks in service at nearly 68 short tons (62 metric tons), it introduced several modern technologies to US armored forces, including a multifuel turbine engine, sophisticated Chobham composite armor, a computer fire control system, separate ammunition storage in a blowout compartment, and NBC protection for crew safety. The M1 Abrams ( / ˈ eɪ b r ə m z/) is a third-generation American main battle tank designed by Chrysler Defense (now General Dynamics Land Systems) and named for General Creighton Abrams. US$6.21 million (M1A2 / FY99) Estimated in 2016 as US$8.92 million (with inflation adjustment)

Chrysler Defense (now General Dynamics Land Systems)

U.s. army vietnam main battle tank