The Battle of Dwarsvlei (Afrikaans: Slag van Dwarsvlei, Action at Onrust) in the Second Boer War (1899–1902) was fought by Boer and British forces on 11 July 1900 in the district of Krugersdorp, South African Republic. The action at Dwarsvlei was part of Koos de la Rey's new guerrilla strategy and coincided with the battles at Silkaatsnek and Onderstepoort on the same day of 11 July 1900.
Battle
The 150 strong Boers, mainly Krugersdorp Commando under General Sarel Oosthuizen (known as "Rooibul", the Red Bull of Krugersdorp, because of his red beard) ambushed British troops of the 1st Gordon Highlanders and the King's Shropshire Light Infantry under Major general Horace Smith-Dorrien on Oosthuizen's own farm. The Boers were armed with a variety of rifles such as Mausers, Lee-Metfords, Martini-Henry's and Guedes Model 1885.
They attacked the British convoy on its way from Krugersdorp in the south to Hekpoort in the north from high ground positions – marked Z on Smith-Dorrien's map shown on this page – on the Witwatersberg mountain range ridge overlooking an intersection on the Krugersdorp-Hekpoort road.
The battle raged all day and at dusk Oosthuizen was seriously wounded when he tried in vain to capture the English cannons, with only a few burghers. He died from his wounds on 14 August 1900. The British withdrew while the Boers were too weak to follow up.