Lac Léopold II District (, ) was a district of the Congo Free State, Belgian Congo and Democratic Republic of the Congo. It went through various changes in extent, but roughly corresponded to the modern Mai-Ndombe Province. Location The district takes its name from Lac Léopold II, today called Lake Mai-Ndombe, which drains to the west along the Fimi River to the Kasai River, a major left tributary of the Congo River. The district seat was the town of Inongo, on the northeast shore of the lake. At its greatest extent between 1914 and 1933 the district extended west from the lake to the Congo River. To the east it extended along the whole length of the Lokoro River in the north, and along most of the Lukenie River in the south up to the border of the present Sankuru province. History In 1895 the number of the districts in the Congo Free State was increased to fifteen, including Lac Léopold II District. The district had been carved out of the north of Kasai District. A map of the Congo Free State in 1897 shows the Lac Léopold II district to the east of the Stanley Pool District, south of the Équateur District and north of the Lualaba Kassai District. The district surrounds Lac Léopold II, and extends in a rectangular area along the whole length of the Lukenie River to the east. The Lokoro River is not shown. The western portion, previously part of the Moyen-Congo District, was added to Lac Léopold II District in 1914. The period between 1927 and 1933 was unsettled, particularly in the Dengese Territory in the east of the district on the border with Sankuru District. There were police actions and occupations in 1927, and the authorities ordered complete disarmament of the population. Police actions continued in 1928, and at the start of 1929 the territory was subject to general occupation. In August 1931 an administrator was ambushed by Dengese helped by some Bapende and Bankutshu. 15 of the attackers were killed before they withdrew after killing one soldier and wounding another. A massive military operation was ordered in response, but incidents continued. Resistance combined passive disobedience such as refusal to pay taxes and active attacks such as arson in Dija. The situation was gradually brought under control, and by mid-March the district was generally calm. The whole Dengese territory was occupied until December