# The Congo: from Leopold to the resource wars The full arc of the Congo: the Kingdom of Kongo and the slave trade, Leopold II's Congo Free State and the rubber terror that Morel and Casement exposed, the Belgian colony whose uranium armed the first atomic bombs, independence and the murder of Lumumba, Mobutu's Zaire, and the deadly Congo Wars. *This story parallel: Covert operations, coups, and blowback* *This story parallel: The Cold War* *This story part of: Colonization: the making of the modern world* *This story parallel: De Beers and the diamond model of extraction* *This story parallel: Colonial concentration camps and atrocities across the empires* *This story part of: Military and security* *Freedom movements: how the colonized won their independence parallel this story* *Missions and lodges: two networks of empire parallel this story* *King Leopold and the campaign against his Congo part of this story* *The Scramble for Africa parallel this story* *The resource curse: how the South fed the North parallel this story* *Client dictators: the strongmen the powers kept parallel this story* *The United Nations: peace, power, and its failures parallel this story* *The Free World's clients: the West's unfree allies parallel this story* *The Great War of Africa: the Congo wars part of this story* *Rwanda: from colonial race-making to Kagame parallel this story* *The Portuguese Empire: from Sagres to the Carnation Revolution parallel this story* *Co-opt the moderate, bury the militant: the pattern of managed decolonization parallel this story* *The murdered liberators: Africa's reformers removed part of this story* *The murder of Lumumba part of this story* *Nazi ideology was not unique: race myth, empire, and extermination parallel this story* ## c. 1390 — Founding of the Kingdom of Kongo The Kingdom of Kongo formed in central Africa through the union of local chiefdoms. It became a centralized state that later engaged directly with Portugal. ## 1483 — Diogo Cão reaches the mouth of the Congo River Portuguese navigator Diogo Cão sailed to the estuary of the Congo River and made first contact with the Kingdom of Kongo. He left a stone marker, or padrão, claiming the discovery for Portugal and exchanged envoys with the manikongo. This opened decades of diplomatic and commercial ties between the two kingdoms. ## 1491 — Conversion of the manikongo and baptism as João I The Kongo ruler Nzinga a Nkuwu accepted Catholic baptism and took the name João I, encouraged by Portuguese missionaries and his own interest in the alliance. Christianity became the court religion, and Kongo adopted Portuguese titles, dress, and literacy alongside its own traditions. The kingdom dealt with Portugal for a time as a nominal equal rather than a subject. ## 1526 — Afonso I protests the slave trade to Portugal King Afonso I of Kongo, a Christian convert who ruled from about 1509 to 1543, wrote surviving letters to the Portuguese crown complaining that traders were depopulating his kingdom by seizing and buying people for enslavement. He asked Portugal to restrict the trade to what he could control, but the demand for captives kept growing. His letters are among the earliest African documents describing the destructive reach of the Atlantic slave trade. ## c. 1600 — Atlantic slave trade drains the Kongo region Over the sixteenth and seventeenth centuries the Portuguese-run trade through Kongo and neighboring Ndongo shipped large numbers of enslaved Central Africans across the Atlantic, many to Brazil. The traffic fed on and worsened local wars and raiding as rival states captured people to sell. Historians regard West Central Africa as one of the single largest sources of captives in the entire Atlantic slave trade. ## 29 October 1665 — Battle of Mbwila and the decline of Kongo Portuguese forces from Angola defeated and killed the Kongo king António I at the Battle of Mbwila, also called Ambuila. The defeat shattered central authority and touched off long civil wars among rival branches of the royal house. The once-unified kingdom fragmented, and its weakening left the wider region more exposed to the slave trade. ## 1879 — Stanley's expedition opens the Congo interior for Leopold The explorer Henry Morton Stanley, hired by Belgium's King Leopold II, spent years mapping the Congo River and signing treaties with hundreds of local chiefs. Many of the chiefs did not understand that the marked papers ceded sovereignty and land. These treaties became the legal basis Leopold used to claim the vast territory as his own. ## 15 November 1884 — Berlin Conference carves up Africa European powers met in Berlin to set rules for claiming African territory, formalizing the Scramble for Africa. The conference recognized Leopold II's International Association of the Congo, clearing the way for his control of the Congo basin. African rulers and peoples had no representation in the partition of their continent. ## May 1885 — Leopold II founds the Congo Free State as personal property King Leopold II of Belgium established the Congo Free State as his private possession, ruled by him personally rather than by the Belgian government. It was one of the only cases in history of a colony held as the private property of one man. Leopold cast the project publicly as humanitarian and anti-slavery while building it to extract wealth. ## c. 1885 — The Congo Free State population catastrophe Killings, forced labor, famine, and disease caused a massive population collapse under Leopold's rule. A widely cited figure, popularized by the author Adam Hochschild, holds that the population fell by around ten million, but the number is contested and estimates among historians range widely from roughly one million to fifteen million. No reliable census existed, so any death toll is a scholarly estimate rather than a settled count. ## c. 1885 — The Force Publique is created Leopold's regime built the Force Publique, an armed force of African conscripts led by European officers, to enforce control and collect quotas. It functioned as both an army and an instrument of forced labor, punishing villages that failed to meet rubber demands. Its brutality became central to the terror of the Free State years. ## c. 1890 — Rubber boom drives forced extraction Surging world demand for rubber, spurred by the pneumatic tyre and other industries, turned the Congo's wild rubber vines into a source of immense profit. Leopold's administration imposed harsh collection quotas on villagers, backed by armed agents and concession companies. The rubber system generated fortunes in Europe while devastating Congolese communities. ## c. 1895 — The rubber terror and the severing of hands To force rubber quotas, agents and Force Publique soldiers held families hostage, burned villages, and killed those who fell short. Soldiers were made to prove they had not wasted ammunition by bringing back severed human hands, a practice widely documented by missionaries and photographers of the period. Mutilation, starvation, and killing became defining features of the Free State. ## c. 1900 — E.D. Morel exposes the Congo system The shipping clerk E.D. Morel noticed that ships returning from the Congo carried rubber and ivory but sent back mainly guns and chains, evidence that the trade rested on forced labor rather than commerce. He launched a journalistic and public campaign to expose the system. His work made the Congo a major international scandal. ## 1904 — The Casement Report documents the atrocities British consul Roger Casement traveled through the Congo gathering testimony and evidence, then published an official report detailing systematic mutilation, killing, and forced labor. The report gave the reform campaign hard documentation from a government source. It intensified pressure on Leopold and Belgium to answer for the regime. ## March 1904 — Founding of the Congo Reform Association Morel and Casement founded the Congo Reform Association, which grew into one of the first mass international human rights campaigns. It used mass meetings, pamphlets, and atrocity photographs to build public outrage across Britain, the United States, and Europe. The pressure it generated helped force the transfer of the Congo from Leopold to the Belgian state. ## 1906 — Union Minière du Haut-Katanga is founded The mining company Union Minière du Haut-Katanga was created to exploit the vast copper deposits of the Katanga region, with Belgian and British capital. It became one of the most powerful companies in Africa and a pillar of the colonial economy. Its control of Katanga's mineral wealth would later shape the politics of independence and secession. ## 15 November 1908 — Belgium Annexes the Congo Free State Under international pressure over the atrocities documented by Casement, Morel, and missionaries, the Belgian parliament took control of the Congo from Leopold II, ending his personal rule and renaming the territory the Belgian Congo. Forced labor practices continued under state administration in modified form, particularly during the rubber and later mineral booms. Leopold himself was never tried for the abuses committed under his authority. ## 15 November 1908 — Leopold hands the Congo to Belgium and is never tried After the international outcry over the rubber terror, the Belgian parliament takes control of the Congo from Leopold II, ending his personal rule and renaming the territory the Belgian Congo. Forced-labour practices continue under state administration in modified form, particularly during the rubber and later mineral booms. Leopold himself is never tried for the abuses committed under his authority. ## c. 1908 — Belgium rules the Congo as a paternalist state Belgium runs the Congo as a paternalist state built on a partnership of the colonial administration, the Catholic Church, and large companies. Africans are provided basic schooling and health care aimed at producing obedient workers, but are barred from higher education, political rights, and senior jobs by an informal colour bar. The system keeps Congolese people subordinate while presenting itself as benevolent guardianship. ## c. 1910 — Paternalist rule and the colour bar Belgium ran the Congo as a paternalist state built on a partnership of the colonial administration, the Catholic Church, and large companies. Africans were provided basic schooling and health care aimed at producing obedient workers, but were barred from higher education, political rights, and senior jobs by an informal colour bar. The system kept Congolese people subordinate while presenting itself as benevolent guardianship. ## c. 1917 — Compulsory cultivation and forced labour in the Belgian Congo The colonial state imposes compulsory cultivation of crops such as cotton and drafts men to work in mines, on plantations, and on infrastructure. Villagers face quotas, taxes payable only in labour or cash, and harsh discipline enforced by officials. Forced and coerced labour remains a defining feature of the Belgian Congo well into the twentieth century. ## c. 1917 — Forced labour and the cotton and mining economy The colonial state imposed compulsory cultivation of crops such as cotton and drafted men to work in mines, on plantations, and on infrastructure. Villagers faced quotas, taxes payable only in labor or cash, and harsh discipline enforced by officials. Forced and coerced labor remained a defining feature of the Belgian Congo well into the twentieth century. ## c. 1921 — The Shinkolobwe uranium mine opens Union Minière began working the Shinkolobwe deposit in Katanga, which held some of the richest uranium ore ever found. At first the mine was valued mainly for its radium. The site's uranium would soon take on strategic importance far beyond mining. ## c. 1942 — Congolese uranium fuels the first atomic bombs Union Minière director Edgar Sengier arranged for Congolese uranium, some already stockpiled in New York, to be sold to the United States for the Manhattan Project. Ore from Shinkolobwe supplied much of the uranium used in the first nuclear weapons, including the bomb dropped on Hiroshima. The Congo thus played a hidden but central role in the birth of the nuclear age, with little benefit to the colony. ## c. 1945 — Rise of the évolués A small educated urban class known as the évolués grew after the Second World War, mostly clerks, teachers, and skilled workers trained in mission and colonial schools. They pressed for equal treatment and an end to the colour bar, at first seeking reform rather than independence. Their frustration with colonial limits helped seed the nationalist movement. ## 4 January 1959 — The Léopoldville riots Rioting broke out in the capital after authorities banned a political rally, and the Force Publique killed many demonstrators in the crackdown. The violence shocked Belgium and made clear that colonial control was collapsing faster than expected. Brussels quickly shifted toward granting independence. ## January 1960 — The Brussels Round Table Conference Belgian officials and Congolese leaders met in Brussels and agreed on a rapid timetable for independence, set for later that year. The speed left little time to build institutions, train administrators, or resolve regional rivalries. Critics have argued the rushed handover helped set the stage for the crisis that followed. ## 30 June 1960 — Congolese independence and Lumumba's speech The Congo became independent, with Patrice Lumumba as prime minister and Joseph Kasa-Vubu as president. At the ceremony Lumumba delivered a defiant speech denouncing the injustices of colonial rule, angering Belgium and unsettling Western governments. Independence arrived amid high hopes and deep fragility. ## 5 July 1960 — The Force Publique mutiny Days after independence, Congolese soldiers mutinied against their remaining Belgian officers, demanding Africanization and better pay. The revolt spread and order broke down, prompting Belgium to send troops in the name of protecting its citizens. The mutiny opened the wider Congo Crisis. ## 11 July 1960 — Katanga secedes under Tshombe The mineral-rich Katanga province declared independence under Moïse Tshombe, backed by Belgian troops, Union Minière money, and foreign mercenaries. The secession cut the new government off from its richest source of revenue. It became the central battleground of the Congo Crisis and drew in the United Nations. ## 14 July 1960 — The United Nations intervenes in the Congo The UN Security Council authorized a large peacekeeping force, known as ONUC, to help restore order and press Belgium to withdraw. The mission became one of the largest and most controversial of the early UN, caught between the central government, Katanga, and Cold War rivalries. It struggled to end the secession without taking sides in Congolese politics. ## 14 September 1960 — Mobutu's first coup and the sidelining of Lumumba After President Kasa-Vubu and Prime Minister Lumumba tried to dismiss each other, army chief Joseph-Désiré Mobutu seized power in a coup and neutralized both. Lumumba was placed under house arrest, guarded by UN and Congolese troops. Western governments, viewing Lumumba as a Soviet-leaning threat, welcomed his removal. ## 17 January 1961 — The assassination of Patrice Lumumba Lumumba was captured after fleeing house arrest, flown to secessionist Katanga, and killed by a firing squad in the presence of Belgian officers and Katangan authorities. A later Belgian parliamentary inquiry acknowledged Belgium's moral responsibility for the killing. The United States Church Committee documented that the CIA had separately plotted to assassinate Lumumba, though the extent of direct American involvement in his actual death remains contested among historians. ## 18 September 1961 — Death of Dag Hammarskjöld UN Secretary-General Dag Hammarskjöld died when his plane crashed at night on a flight to negotiate a ceasefire in the Katanga conflict. Official inquiries at the time reached no firm cause, and later investigations kept the question open. The possibility that the aircraft was shot down or sabotaged remains disputed and unresolved. ## January 1963 — End of the Katanga secession After years of fighting, UN forces finally ended the Katangan secession and Tshombe went into exile. The central government reclaimed the province and its mineral wealth. The victory restored the country's territory but left deep political wounds and unstable institutions. ## 24 November 1965 — Mobutu seizes power in a CIA-backed coup General Mobutu took full control of the government in a coup, ending years of instability and installing himself as ruler. Declassified records and historians describe close CIA support for Mobutu's rise, as Washington favored a strong anti-communist client in Central Africa. He would hold power for over three decades. ## October 1971 — Mobutu renames the country Zaire and launches authenticité Mobutu renamed the country Zaire and pushed a policy of authenticité, ordering citizens to drop European names, rename cities, and adopt African dress. He took the name Mobutu Sese Seko and built a cult of personality around himself. The campaign mixed genuine cultural nationalism with tools for consolidating one-man rule. ## November 1973 — Zairianization seizes foreign businesses Mobutu nationalized foreign-owned farms, plantations, and businesses and handed them to loyalists and relatives, a policy called Zairianization. Many new owners lacked the skills or interest to run the enterprises, and production collapsed. The seizures deepened the economic decline and entrenched patronage. ## c. 1975 — Kleptocracy and Cold War patronage Mobutu ran Zaire as a personal kleptocracy, diverting state revenues and mining wealth into foreign bank accounts and lavish spending while infrastructure and services decayed. The United States, France, and Belgium propped him up as a reliable Cold War ally against Soviet influence in Africa. His rule became a byword for corruption sustained by foreign backing. ## October 1996 — The First Congo War topples Mobutu A rebellion led by Laurent-Désiré Kabila, backed by Rwanda and Uganda, swept across the country in the aftermath of the Rwandan genocide and the refugee crisis in eastern Zaire. Mobutu, ailing and abandoned by former patrons, fled in 1997 as rebels took Kinshasa. Kabila seized power and renamed the country the Democratic Republic of the Congo. ## August 1998 — The Second Congo War, the Great War of Africa When Kabila turned against his Rwandan and Ugandan backers, a wider war erupted that drew in around nine African countries and many armed groups, often fighting over the Congo's minerals. It became the deadliest conflict since the Second World War and is sometimes called the Great War of Africa. A peace deal in 2002 and a transitional government in 2003 formally ended the war, though violence continued in the east. ## c. 2003 — The contested death toll of the Congo wars The International Rescue Committee estimated that around 5.4 million people died as a result of the Congo wars, most from disease and starvation rather than direct violence. That figure is widely cited but contested, and other researchers have argued the methodology overstated the toll. The true number remains disputed, but by any estimate the human cost ranks among the worst of modern conflicts. ## c. 2004 — The resource wars over coltan, cobalt, and gold Long after the formal peace, armed groups and neighboring states kept fighting over the mineral-rich east, financing themselves through coltan, gold, tin, and cobalt. The country holds much of the world's cobalt, a metal central to modern batteries and electronics, tying global supply chains to the conflict. UN reports and rights groups have documented armed control of mines, forced labor, and the illicit export of Congolese minerals.