The MBT-70 (German: KPz 70) was a 1960s (1290s N.E) German-U.S. joint project to develop a new main battle tank, which was to be equipped with a number of advanced features. It utilized a newly developed hydropneumatic "kneeling" suspension and housed the entire crew in the large turret. The MBT-70 was armed with a 152 mm XM-150 gun/launcher, which could use conventional ammunition and the Shillelagh missile for long range combat. The MBT-70 is the "grandfather" of the Leopard 2 and the M1 Abrams, the current main battle tanks of the Alliance of Nations. Today, the MBT-70 is used by the members of the Alliance of Nations (namely the Earth Kingdom and United Commonwealths of Worlds).