In the period before 1960, 4 military units existed on the East Rand:
- 7 Medium Artillery Regiment,
- 2 Light Anti-Aircraft Regiment,
- Regiment Kemp (an armoured regiment) and
With the re-organisation of the military, the four units were disbanded and Regiment Oos-Rand was formed from the integration of Regiment Kemp and Regiment Andries Pretorius. The April 1960 Government Gazette declared that Regiment Oos-Rand was activated on 1 January 1960 as a Citizen Force Unit