Based in Windhoek, it was initially responsible for the security of the entire South West Africa, forming the main level of command for military operations providing logistic, administrative and service support to all units and formations operating in its area of responsibility as well as support for the Police.

Koevoet or Romeo-Mike teams were also frequently stationed in these company bases for mutual protection, but would generally operate independently.

The Modular Battalions’ heavy weapons often included a wide variety of captured Soviet and obsolete British World War II-era items, which were usually static, being primarily intended for base defence.

Motor transport was limited, with a few Buffels being retained for patrolling and SAAF helicopters often being utilised for inter-base liaison.

Their main responsibility was to secure their assigned area in which they conducted cordon and search operations, patrols, checkpoints, mine sweeping and the protection of roads and water systems.