Regiment Boland traced its ancestry back to Regiment Westelike Provincie (RWP) (now called Regiment Westelike Provinsie), which was one of the Afrikaner-oriented units that was raised by the Union Defence Force in 1934. RWP was renamed Regiment Onze Jan in 1951, only to be changed again in 1960, to Regiment Boland. The Regiment acquired a second battalion in 1972, with the 1st Battalion being headquartered at Paarl and the 2nd Battalion at Worcester.
However, the 1st Battalion fought to regain their original name and this succeeded in 1974, when the two battalions became independent units - the 1st Battalion became Regiment Westelike Provincie and was headquartered in Cape Town, while the 2nd Battalion retained the designation Regiment Boland. The only remnant of their association was the similar cap-badges of the two Regiments.