According to my knowledge, Adendorf was a German , who had come up from Caffraria with Schermbrucker or earlier! Definetly not a boer!
There are records of the boers actually allying themselves with the Zulu and for certain with Umbelini in the disputed territory. Only Uys with his group joined the 4th Column of Wood out of personal reason and gain. He was farming in the disputed territory and also wanted to revenge the murder of his family in 1838 by the Zulus.