The Belgian forces under Francis Dhanis launched a campaign against the slave dealers in 1892, and Rumaliza was one of the main targets.[22] Dhanis advanced up the river. He reached Nyangwe on 4 March 1893 and Kasongo on 22 April 1893, finding both towns abandoned. He found a huge supply store at Kasongo including ivory, ammunition, food and luxuries such as gold and crystal tableware.