At that time Basotho territory included much of what is now the Free State province of South Africa.
This territory was lost in the 1850s and 1860s in a series of wars between the Basotho and the Boers of the Orange Free State.
Except for a period of annexation to the Cape Colony from 1871 to 1884, it remained in this status until independence was achieved as the Kingdom of Lesotho in 1966.
The border between Basutoland and the Orange Free State was defined in the 1869 Convention of Aliwal North.
All ten districts of Lesotho touch the border, as do three provinces of South Africa: the Free State, KwaZulu-Natal and the Eastern Cape.