What happened 13 March 1900 AD

After a succession of defeats, the Boers realized that against such overwhelming numbers of troops, they had little chance of defeating the British and so became demoralized. Roberts then advanced into the Orange Free State from the west, putting the Boers to flight at the Battle of Poplar Grove and capturing Bloemfontein, the capital, unopposed on 13 March with the Boer defenders escaping and scattering. Meanwhile, he detached a small force to relieve Baden-Powell.