I just finished re-reading "Power of the Sword" by Wilbur Smith, great author, great books. This particular title included the "pulpish" element of Ossewa Brandwag ("oxwagon sentinel"), which was the South-African Nazi movement before and during WW2. I can see images of new scenarios for my Boer miniatures...
Wikipedia:
However, not all South Africans supported the war effort. The Anglo-Boer war had ended only thirty five years earlier and to some, siding with the "enemy" was considered disloyal and unpatriotic. These sentiments gave rise to "The Ossewabrandwag" ("Oxwagon Sentinel"), originally created as a cultural organisation on the Centenary of the Great Trek becoming more militant and openly opposing South African entry into the war on side of the British. The organisation created a paramilitary group called Stormjaers ('storm chasers'), modelled on the Nazi SA or Sturmabteilung ("Storm Division") and which was linked to the German Intelligence (Abwehr) and the German Foreign Office (Dienstelle Ribbentrop) via Dr. Luitpold Werz - the former German Consul in Pretoria. The Stormjaers carried out a number of sabotage attacks against the Smuts government and activly tried to itimidate and discourage volunteers from joining the army recruitment programs.[6] Many members of the Ossewabrandwag were incarcerated during the war, amongst them - John Vorster, who would later become Prime Minister. After the war, the Ossewabrandwag went underground and a number of its erstwhile members, including future South African State President P.W. Botha, went on to rise in the ranks of the Apartheid government.