Battle of Mhlatuze River
1820 CE.
Shown on the map at -28.833°, 32.000°.
The Battle of Mhlatuze River was fought between the Zulu and Ndwandwe tribes in 1820 following the Zulu Civil War. The Ndwandwe hierarchy was set asunder by the battle, and largely scattered their population in response.
Text from the Wikipedia article Battle of Mhlatuze River, licensed CC BY-SA 4.0.