In 1950, a 21 SAS squadron was raised to fight in the Korean War. After three months of training in Britain, it was informed that the squadron would no longer be required in Korea and so it instead volunteered to fight in the Malayan Emergency. Upon arrival in Malaya, it came under the command of "Mad Mike" Mike Calvert who was forming a new unit called the Malayan Scouts (SAS). Calvert had already formed one squadron from 100 volunteers in the Far East, which became A Squadron—the 21 SAS squadron then became B Squadron; and after a recruitment visit to Rhodesia by Calvert, C Squadron was formed from 1,000 Rhodesian volunteers. The Rhodesians returned home after three years' service and were replaced by a New Zealand squadron. By this time the need for a regular army SAS regiment had been recognised; the 22 SAS Regiment was formally added to the army list in 1952 and has been based at Hereford since 1960. In 1959 the third regiment, the 23 SAS Regiment, was formed by renaming the Reserve Reconnaissance Unit, which had succeeded MI9 and whose members were experts in escape and evasion.