John Dunn entered Zululand in 1857. He observed Zulu customs and law and he exploited Zulu soial institutions to his political and economic advantage. His accumulation of land, cattle, wives and clients made him one of the wealthiest men in the Zulu kingdom. Dunn manipulated and utilized his wealth to increase his status and influence. His privileged position with Cetshwayo, his alliances with many clans through marriage and his access to firearms made Dunn a powerful figure in the Zulu kingdom.
Dunn's varied career as a trader, labour recruiter, arms supplier and adviser underlines the freedom of political and economic action available to white frontiersmen operating in those zones that straddled the boundaries separating black African states from white colonial societies. The failure of the Zulu royal family to solve the succession question – the essential malaise that plagued the Zulu political system periodically throughout much of the kingdom's history and which, at times, threatened to destroy national unity – presented opportunities for white frontiersmen, like Dunn, to advance their careers. Dunn became involved in Zululand's internal affairs during a period of political turbulence and internecine warfare. The civil war of 1856 had killed off no less than eight potential heirs to the throne and sent Mpande's political career into permanent decline. But new rivalries between the royal princes Cetshwayo, Hamu and Zibepu emerged almost immediately. Cetshwayo used Dunn's assistance to secure his claim to the throne. Dunn's own economic interests prompted him to support Cetshwayo's political aspirations. The control of vital resources, strategic trade routes and firearms was a crucial factor in Cetshwayo's accession in 1873. John Dunn played a major role in providing the material foundations of Cetshwayo's power.