Towards the later Seventies the need of increase fire power of U.S. self-propelled guns led to the development of an 203 mm gun with extended barrel. The M-110 A2 has considerable improvements compared to its predecessors M-107 and M-110 A1 and is used by the U.S. Army and many NATO countries. The 203 mm gun has a firing range of more than 36 km and can be used with conventional grenades as well as nuclear ammunition. M-110's were widely used by Israel during the Lebanon crisis in the Eighties. During the Gulf war the allies used M-110s too. The gun can be dispatched by C-141 or C-5 giant cargo planes for immediate actions.