Because of the attacks, the Krugers returned to the highveld, where they took part in Potgieter's campaign that forced Mzilikazi to move his people north, across the Limpopo River, to what became Matabeleland. Kruger and his father settled at the foot of the Magaliesberg mountains in the Transvaal. In Natal Andries Pretorius defeated more than 10,000 of Dingane's Zulus at the Battle of Blood River on 16 December 1838, a date subsequently marked by the Boers as Dingaansdag (Dingane's Day) or the Day of the Vow.