The M1 Abrams is a third-generation American main battle tank designed by Chrysler Defense and named for General Creighton Abrams. Conceived for modern armored ground warfare, it is one of the heaviest tanks in service at nearly 73.6 short tons. It introduced several modern technologies to United States 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. 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.
U.S. Army M1A2 Abrams with production TUSK explosive reactive armor package installed in Iraq, 2008
General Motors XM1 prototype
M1 Abrams 105 mm main battle tanks maneuver into firing positions during Exercise REFORGER '85.
Early production vehicle in 1983
A main battle tank (MBT), also known as a battle tank or universal tank, is a tank that fills the role of armour-protected direct fire and maneuver in many modern armies. Cold War-era development of more powerful engines, better suspension systems and lighter composite armour allowed for the design of a tank that had the firepower of a super-heavy tank, the armour protection of a heavy tank, and the mobility of a light tank, in a package with the weight of a medium tank. The first designated MBT was the British Chieftain tank, which during its development in the 1950s was re-designed as an MBT. Throughout the 1960s and 1970s, the MBT replaced almost all other types of tanks, leaving only some specialist roles to be filled by lighter designs or other types of armoured fighting vehicles.
German Army Leopard 2A5 main battle tanks in 1996
Early model Mark I tank at the Battle of Somme, 1916
Abandoned French Hotchkiss H-39 light cavalry tank, Battle of France, 1940
New Panther tanks being loaded for transport to the Eastern Front