History of South Africa (1815–1910) Wikipedia
The early 19th century saw a time of immense upheaval relating to the military expansion of the Zulu kingdom. Sothospeakers know this period as the difaqane ("forced migration"); while Zuluspeakers call it the mfecane ("crushing").. The full causes of the difaqane remain in dispute, although certain factors stand out. The rise of a unified Zulu kingdom had particular significance.