During the closing years of the nineteenth century, Britain demanded that the South African Republic grant voting rights to British miners living in the country - a demand that, if met, would have meant the end of Boer political control over their own state. The Boers turned down the request and war broke out in October 1899. The British command, which had been used to fighting colonial wars against enemies armed with spears, believed they were looking at a walkover; in the words of Lord Kitchener, "a teatime war" that would get the troops home in time to open their Christmas presents.
In fact, the battle turned into the most expensive campaign since the Napoleonic Wars. During the early phase of the war, the Boers took the imperial power by surprise and penetrated into British-controlled KwaZulu-Natal and the Northern Cape, inflicting a series of humiliating defeats. By June a reinforced British army was pushing the Boers back and once again the high command was talking about being home in time for their Christmas pudding. But the Boers fought on for another two years of protracted guerrilla war. Lord Kitchener responded ruthlessly with a scorched-earth policy that left the countryside a smouldering wasteland and thousands of women and children homeless. To house these thousands of dispossessed, the British introduced the concentration camp , in which 26,370 Boer women and children died. For some Afrikaners, this episode remains a major source of bitterness against the British today. Less widely publicized were the African concentration camps which took 14,000 lives. By 1902, the Boers were demoralized and split between those who couldn't face another winter of near starvation (the so-called "hands-uppers") and those who wanted to fight on ("the bitter-enders"). In May that year, the Boer republics signed a treaty surrendering their independence in exchange for British promises of reconstruction. By the end of the so-called "teatime war", Britain had committed nearly half a million men to the field and lost 22,000 of them. Of the 88,000 Boers who fought, 7000 died in combat. With the two Boer republics and the two British colonies under imperial control, the way was clear for the federation of the Union of South Africa in 1910.