Due to being starved after the siege, the Basotho signed a treaty in April 1866 in which they agreed to surrender 3 000 cattle. They also surrendered more than two-thirds of their arable land. At the time, Basotho faced large scale starvation and thus Moshoeshoe and his subjects agreed to the Orange Free State's terms. The land they forfeited during this treaty included conquered territory on the west of the bank of the Caledon River and
Orange River. This left Basotho with a significantly reduced cultivable area close to Thaba Bosiu, as well as 32 km of arable soil on the east bank of the Caledon River. Villagers, however, did not vacate the surrendered territory and in March 1867, Orange Free State President
Johannes Henricus Brand ordered both a resumption and intensification of Free State military action. In 1867, After the Third
Free State–Basotho War, when Free State conquered the whole Lowlands, Moshoeshoe requested
British protection which was granted in March 1868 on the eve of the Boer attack on Thaba Boisu. Lesotho became a British territory. Thaba Bosiu was the only part of the territory which had remained invincible. ==Thaba Bosiu Affair==