The 155mm artillery howitzer developed by the South Africa Republic began in the late 70-ties. The artillery gun itself was developed by Canadian Space Research Corporation, by the requirements of "Armscor." The first test example was built in 1981. Since then it passed army trials and participated in military operations in Angola. Furthermore it was one of the most important weapon system in the Angolan War. Self-propelled gun-howitzer entered service with South African army in 1988 and was designated as G-6 "Rhino." There are approximately 40 of these artillery units operational with South Africa Republic. The G-6 is also in service with United Arabian Emirates army. It is considered as one of the most successful artillery unit of the world.