This expedition was diverted to the east, and, after a campaign extending over several months, during which several battles were fought and the Arab strongholds of Nyangwe and Kasongo were captured, the Arab power was broken and many of the leading Arabs were killed.
In harmony with this political change the trade routes have been completely altered, and the traffic which used to follow the well-beaten track from Nyangwe and the Lualaba across Tanganyika to Ujiji, or round the lake to Zanzibar, now goes down the Congo to Stanley Pool and the Atlantic."
By his will dated the 2nd of August 1889 King Leopold bequeathed to Belgium "all our sovereign rights over the Independent State of the Congo, as they are recognized by the declarations, conventions and treaties concluded since 1884 between the foreign powers on the one side, the International Association of the Congo and 2 After 1900 Nyangwe and Kasongo again became towns of some importance, and traffic along the route to Tanganyika revived with the advent of railways, though the main traffic continued down the Congo river.
Nyangwe, on the Lualaba, a little south of 4° S., was a large native town which, about the middle of the 19th century, came under the dominion of the Zanzibar Arabs.
From Nyangwe a railway goes towards Lake Tanganyika.
Above Nyangwe, on the main stream, another railway is built around the next series of cataracts, thus opening to through communication the upper Lualaba.