The M1 Abrqams MBT redefined how the U.S. Army thought, planned, trained and fought. For the first time in history, the U.S. Army had the best tank in the world, the ultimate balance of firepower, mobility and protection. The M1, more than any other tank, was designed to keep its crewmen alive. On battlefields ranging from the deserts of Kuwait and Iraq to Baghdad itself, it ahs done just that.