In March and April 1892, Tippu Tip's son
Sefu bin Hamid began attacking Congo Free State personnel in eastern Congo, including ivory trader Arthur Hodister—sent by the Syndicat Commercial du Katanga to 'acquire' ivory—and Captain
Guillaume Van Kerckhoven, who had been forcefully confiscating ivory from several powerful Arab traders. These expeditions united regional slave and ivory traders to fight their common enemy, the Congo Free State.
The Times reported in 1892 that, during further explorations in the Congo, Hodister was captured and killed, his head stuck on a pole. Relations were further strained when Rashid refused to assist in the investigation of Hodister's death.
Ngongo Lutete also led actions in the east at this time.
Initial hostilities in the Congo. His better-armed forces defeated
Rumaliza, c. 1900 The Force Publique, under
Francis Dhanis, was sent to
Katanga to resupply the Lofoi trading post, establishing new outposts on his path. During this mission, the Force Publique crossed paths with Ngongo Lutete's soldiers. Lutete had been captured by Tippu Tip as a boy; after winning his freedom, he became the leader of the
Batetela and Bakusu. Lutete's forces were heading west to
Kasaï, picking up weapons from
Angola in an attempt to strengthen their position in the
Lomani region. After several skirmishes in April–May 1892 with the better equipped Free State forces of Dhanis and Michaux, Lutete decided to make a deal with the Congo Free State. On 19 September, he switched sides and joined the
Force Publique – other native leaders like Pania Mutomba before him and Lupungu, chief of the
Songe at
Kabinda shortly thereafter, had also joined the Force Publique.
Maniema campaign By October 1892, Sefu was leading a force of 10,000 men (some 500 Zanzibari officers, the rest Congolese). Open warfare broke out in late November 1892, when Sefu set up a fort on the
Lomami River, where the Force Publique attacked him and eventually was forced to retreat. He allowed his army to travel with all of their wives, slaves, and servants, who did all of the army's cooking and cleaning and acted as a supply train.
Rumaliza campaign By this time, the Congo Free State gained military strength in the region and became less tolerant of "Arab" strongmen, determined to stamp them out. The Congo Free State forces under
Francis Dhanis launched a new campaign against the slave traders in 1892, and Rumaliza was one of the main targets. By 1892, the Swahili slave and ivory trader
Rumaliza dominated
Tanganyika from his base at
Ujiji on the old slave route that led from
Stanley Falls up the
Lualaba River to
Nyangwe, east to Lake Tanganyika and then via
Tabora to
Bagamoyo opposite Zanzibar. The total number of
Swahili fighters in this huge region numbered around 100,000, but each chief acted independently from the main body. Although experienced in warfare, they were poorly armed with simple rifles. The Belgians had just 600 troops divided between the
Basoko and
Lusambo camps, but were much better armed and had six cannons and a machine gun. In the previous years (1886-1891), the
Society of Missionaries of Africa founded Catholic missions at the north and south ends of
Lake Tanganyika.
Léopold Louis Joubert, a
French soldier and armed auxiliary, was dispatched by Archbishop
Charles Lavigerie's Society of Missionaries of Africa to protect the missionaries. The missionaries abandoned three of the new stations due to Tippu Tip's and Rumaliza's attacks. By 1891, the slavers had control of the lake's entire western shore, apart from the region defended by Joubert around
Mpala and
St Louis de Mrumbi. The
anti-slavery expedition under Captain
Alphonse Jacques—financed by the
Belgian Anti-Slavery Society—came to the relief of Joubert on 30 October 1891. When the Jacques expedition arrived, Joubert's garrison was down to about 200 men, poorly armed with "a most miscellaneous assortment of
Chassepots,
Remingtons and muzzle-loaders, without suitable cartridges." He also had hardly any medicine left. Captain Jacques asked Joubert to remain on the defensive while his expedition moved north. On 3 January 1892, Captain Alphonse Jacques' anti-slavery expedition founded the
Albertville fortress on
Lake Tanganyika's shores, and tried to end the slave trade in the region. Rumaliza's troops surrounded Albertville on 5 April and besieged the outpost for 9 months. Eventually, Rumaliza's forces had to retreat because of the arrival of the
Long-Duvivier-Demol Anti-Slavery expedition, a relief column sent from Brussels at captain Alphonse Jacques's aide.
The capture of Nyangwe and Kasongo On 28 January 1893, Congo Free State forces reached the western bank of the Lualaba River opposite the city of
Nyangwe, a major trading port for slaves and ivory in the region. The forces made no attempt to cross and instead established a camp on their side of the river, though over subsequent weeks they occasionally fired musket rounds at the city. On 4 March, the Free State forces crossed the river using 100 dugout canoes piloted by Genia fisherman. Surprised by the crossing, the Arab defenders and their allies in the city fled, allowing it to fall largely without resistance. Free State forces established a fortified position in an elevated area in the city. On 13 March, residents in Nyangwe revolted. The Free State troops defeated the insurrection and, out of fear of further unrest, set most of the city ablaze. The majority of Free States forces left on 17 April. Free State Army Captain Sidney Langford Hinde wrote that by the time the troops departed, the city "had been reduced from a well-built town of about thirty thousand inhabitants to one large fortified house with a soldiers' camp around it." With Nyangwe secured, the Free State forces focused on capturing
Kasongo. Tippu Tip's capital in Maniema, the city was 35 miles south of Nyangwe and regularly hosted 20,000 residents, but the population had tripled due to an influx of refugees from Nyangwe as well as troops led by Said bin Abed and Muhammad bin Amici. Having never anticipated that Kasongo would be threatened, Sefu's lieutenants hurriedly worked to organise defences. Dhanis advanced up the river to
Kasongo on 22 April 1893, while sending Lieutenant Doorme and his advanced guard to encircle the city. Caught between the Free State troops, the Arab defenders as well as civilians and slaves fled the city, letting it fall to their attackers in two hours. The Force Publique found a large supply store at Kasongo, including ivory, ammunition, food and luxuries such as sugar, candles,
gold, and
crystal tableware. Sefu and the other Arab leaders escaped. For the next six months, Dhanis remained inactive, setting up supply routes and befriending the local tribes, while Rumaliza's forces were swelled by Swahili fighters who escaped earlier defeats by Dhanis.
Fight for the Stanley Falls , 1890 In 1893,
Louis-Napoléon Chaltin was head of the
Force Publique station at
Basoko—the camp at Basoko had been established by the Congo Free State as a precaution, in the event of a quarrel with the Arab slave and ivory traders at Stanley Falls. Captain Chaltin and
Richard Mohun—a commercial agent for the United States and the commander of the
artillery battery attached to this expedition—were ordered in May 1893 to join Captain Dhanis' forces near Kasongo. Chaltin went up the
Lomami River to
Bena-Kamba with two
river steamers, then striking overland to
Riba Riba, near present-day
Kindu. At this point, smallpox had broken out in his caravan, and Chaltin was forced to return to Basoko. Chaltin arrived at Stanley Falls on 18 May, where Captain Tobback and Lieutenant Van Lint had for five days been resisting the attacks of the forces of Rashid ben Mohammed, the nephew of Tippu Tip. On the landing of the troops from Basoko at Stanley Falls, the Arab attackers decamped, leaving the town. After defeating them again at
Kirundu, the Arab traders were expelled from the region. Chaltin went on to secure the
Dungu region in the northeast of the Congo Free State, and was commander of the
Haut-Uélé district from 1893. On 25 June 1893, Commandant Pierre Ponthier arrived at the Stanley Falls from Europe. He immediately collected all the troops he could, took Captain
Hubert Lothaire and some men from Bangala with him and followed the Arab units, who had fled from the Stanley Falls up the river. After some severe fighting and many skirmishes, he cleared the river and its neighbourhood, as far as Nyangwe. During a fortnight's severe fighting, Commandant Ponthier's attacks on the forts of Rumaliza failed, and Ponthier was killed in action.
Rumaliza's last stand , 1894. Albertville,
Marungu (and Mpala) are to the west of the southern portion of
Lake Tanganyika. After the fall of Nyangwe and Kasongo,
Rumaliza, the Arab leader of Ujiji, brought a large army from the
Lake Tanganyika region to Kabambare to retake the Arabs' lost ground. His troops then advanced towards the Lualaba River and erected forts south of Kasongo to threaten the Free State's control over the city. Rumaliza's force clashed with Dhanis' column on 15 October 1893, causing the death of two European leaders and 50 of their soldiers. On 19 October 1893, Rumaliza attacked a position one day's march from
Kasongo. Dhanis concentrated his forces and defeated Rumaliza. The war's last major battle occurred on 20 October 1893, on the
Luama River, west of
Lake Tanganyika. It was a tactical stalemate, but
Sefu was killed, and the remaining resistance soon disintegrated. By 24 December 1893, Dhanis obtained reinforcements and was ready to advance again. Rumaliza had also received assistance. Dhanis sent one column under Gillain to prevent Rumaliza's retreat, and another under De Wouters to advance on Rumaliza's fort near Bena Kalunga. A group of fresh forces coming to Rumaliza's aid from
German East Africa was headed off, and Dhanis's forces closed in on Rumaliza's
bomas (Swahili for fort). On 9 January 1894, Belgian reinforcements arrived under Captain
Hubert Lothaire, and the same day a shell blew up Rumaliza's ammunition store and burned down the fort containing it. Most of the occupants were killed while attempting to escape. Within three days, the remaining forts, cut off from water and other supplies, surrendered. More than two thousand prisoners were taken. A column under Lothaire pursued him to the north of Lake Tanganyika, destroying his fortified positions along the route, although Rumaliza himself managed to escape. At the lake, they joined with the anti-slavery expedition led by Captain
Alphonse Jacques Rumaliza took refuge in the German colony of
German East Africa. The war ended in a victory for the Free State by January 1894. == Aftermath and impact ==