Maybe I can add that the Boers never marched on Pretoria, then
the capital of the ZAR (Zuid-Afrikaansche Republiek of Paul Kruger).
The ZAR and the Free State were at war with England (1899-1902).
50 000 Boers resisted against 450 000 British soldiers in a war that cost England 230 million pounds.
By the time the English forces reached Pretoria it was pretty deserted, the ZAR having moved their HQ.
The scorched earth policy of Kitchener lead to the death of 28 000 Boer women and children in the concentration camps. Some 30 000
farm houses and 40 towns were burnt down.
And they also call it "the last gentleman's war". :-)
Google Anglo Boer War.