 The U.S. Army's "LHX" program began in the early 1980s, proposing two helicopter designs with a high percentage of commonality of dynamic components.One was a light utility version ("LHX-U") for assault and tactical movement of troops and supplies, the other was a light scout/attack version ("LHX-SCAT") to complement the growing development of the AH-64 Apache.As the program was developed, the light utility version was dropped and focus was placed on the light attack reconnaissance version, which eventually became the RAH-66 Comanche.