The National Party-voting Western Cape districts generally did not support South Africa's involvement in World War II. In spite of this R.W.P was able to muster enough men who were willing to go on active service. The Regiment mobilised on 1 September 1940 and became No. 12 Armoured Car Company, South African Tank Corps. After months of training in this new role, No12 Armoured Car Company was amalgamated with No. 11 Armoured Car Company (RSWD) Regiment Suid Westelike Distrikte, to form 5th Armoured Fighting Vehicle Regiment, South African Tank Corps. The Regiment moved to Egypt in September 1941 but was disbanded on 13 October 1941 after arrival. The personnel were used as reinforcements for depleted armoured car regiments already operating in the Western Desert with whom they participated in many of the well known battles in North Africa like Sidi Rezegh, Bir Hakeim, Gazala, and El Alamein.