The Piet Retief Delegation massacre and the Weenen massacre was the motivation for the Voortrekkers to confront the Zulus in battle on 16 December 1838 when 470 Voortrekkers fought against an estimated 15,000 to 21,000 Zulus ; which the Voortrekkers won . The battle is known as the Battle of Blood River
Piet Retief Delegation massacre
Piet Retief Delegation massacre
Weenen massacre