The M1 Abrams Tank was manufactured by United States. It was named after General Creighton Abrams, former Army Chief of Staff Commander of U.S. Military forces in the Vietnam War from 1968 to 1972. This tank is equipped with a 1,500 horsepower jet turbine engine. It runs on JP8 jet fuel, but in an emergency it can run on gasoline, diesel fuel, home heating oil, and kerosene. The M1 Abrams can travel up to 42 mph and is protected with a very strong layered armor and has a 120 mm smooth bore cannon, a thermal sight, and a laser range finder. It can hit targets up to 2 miles away and has 3 machine guns; one 50 caliber and two 30 caliber. The cannon shells are stored in a blow-out compartment for crew safety and it fires 3 or 4 different kinds of cannon shells. It is one of the most powerful tanks in the world. Weighing nearly 68 tons, the M1 Abrams is one of the heaviest main battle tanks in service. It is not only equipped with a radio and field telephone, but it is digital. American armored vehicles and combat aircraft are equipped with computers and have their own internet. With this they can be aware of everything that is happening in real time, as it is happening on and near the battle field. If any one of a group of M1 Abrams Tanks on the battlefield sees a target, any one of those tanks can fire on and potentially hit that target within 1.5 to 2 mile range.