Districts of the Belgian Congo

In 1910 the western districts of Banana, Boma, Matadi and Cataractes were consolidated into one administrative unit, Bas-Congo, reducing the number to twelve.

[1] Parts of the Stanley Falls and Lualaba districts were combined to form Katanga in 1910, which was called a vice-government general.

The colonial administrators felt the need to assign the many diverse ethnic groups to defined territories, where before they had often been mobile.

[6] The Congo-Kasaï and Orientale provinces were both split, and some other adjustments were made to form six provinces named after their capitals; Léopoldville, Lusambo (Kasai), Costermansville (Kivu), Elisabethville (Katanga), Stanleyville (Orientale) and Coquilhatville (Équateur).

[4] There continued to be frequent adjustments to district and territory boundaries, mostly to recognise sectional and tribal divisions.