[3] The province is dominated by dry savannah land; only in the Kasai River valley are there remnants of tropical rainforest.

The Kasai forms the eastern and southern frontier of Lunda Sul and is the main river of the province.

[7] In spring 1999, UNITA destroyed the bridge on the Kasai River at Biula, affecting transport communications in the region between Lunda Sul and Moxico.

[10] The origin of the province's population belongs to the ethnic groups of the Lunda and Chokwe people, which are closely connected historically.

The struggle between the Lunda and Chokwe to obtain wealth from the diamond industry has increased tension in the province.