From the tableland north of the Maluti several isolated hills rise, the most noted being the almost inaccessible Thaba Bosigo - the rallying place of the Basuto in many of their wars.
He established himself in 1824 on the rock-fortress of Thaba Bosigo, where, in 1831, he successfully defended himself against Mosilikatze; and thereafter became second only to that chief among the natives north of the Orange River.
They also annexed a certain fertile portion of Basuto territory, and finally terminated the strife by a treaty at Thaba Bosigo, by which Moshesh gave up the tract of territory taken by the Boers and professed himself a subject of the Free State.
A treaty was signed at Thaba Bosigo in April 1866, but war again broke out in 1867, and the Free State attracted to its side a large number of adventurers from all parts of South Africa.
The burghers thus reinforced gained at length a decisive victory over their great antagonist, every stronghold in Basutoland save Thaba Bosigo being stormed.