Until the middle of the nineteenth century, Uganda remained relatively isolated from the outside world. The central African lake region was, after all, a world in miniature, with an internal trade system, a great power rivalry between Buganda and Bunyoro, and its own inland seas. When intrusion from the outside world finally came, it was in the form of long-distance trade for ivory.

Ivory had been a staple trade item from the East Africa coast since before the time of Christ. But growing world demand in the nineteenth century, together with the provision of increasingly efficient firearms to hunters, created a moving "ivory frontier" as elephant herds near the coast were nearly exterminated. Leading large caravans financed by Indian moneylenders, coastal Arab traders based on Zanzibar (united with Tanganyika in 1964 to form Tanzania) had reached Lake Victoria by 1844. One trader, Ahmad bin Ibrahim, introduced Buganda's kabaka to the advantages of foreign trade: the acquisition of imported cloth and, more important, guns and gunpowder. Ibrahim also introduced the religion of Islam, but the kabaka was more interested in guns. By the 1860s, Buganda was the destination of ever more caravans, and the kabaka and his chiefs began to dress in cloth called mericani, which was woven in Massachusetts and carried to Zanzibar by American traders. It was judged finer in quality than European or Indian cloth, and increasing numbers of ivory tusks were collected to pay for it. Bunyoro sought to attract foreign trade as well, in an effort to keep up with Buganda in the burgeoning arms race.

Bunyoro also found itself threatened from the north by Egyptian-sponsored agents who sought ivory and slaves but who, unlike the Arab traders from Zanzibar, were also promoting foreign conquest. Khedive Ismael of Egypt aspired to build an empire on the Upper Nile; by the 1870s, his motley band of ivory traders and slave raiders had reached the frontiers of Bunyoro. The khedive sent a British explorer, Samuel Baker, to raise the Egyptian flag over Bunyoro. The Banyoro (people of Bunyoro) resisted this attempt, and Baker had to fight a desperate battle to secure his retreat. Baker regarded the resistance as an act of treachery, and he denounced the Banyoro in a book that was widely read in Britain. Later British empire builders arrived in Uganda with a predisposition against Bunyoro, which eventually would cost the kingdom half its territory until the "lost counties" were restored to Bunyoro after independence.

Farther north the Acholi responded more favorably to the Egyptian demand for ivory. They were already famous hunters and quickly acquired guns in return for tusks. The guns permitted the Acholi to retain their independence but altered the balance of power within Acholi territory, which for the first time experienced unequal distribution of wealth based on control of firearms.

Meanwhile, Buganda was receiving not only trade goods and guns, but a stream of foreign visitors as well. The explorer J.H. Speke passed through Buganda in 1862 and claimed he had discovered the source of the Nile. Both Speke and Stanley (based on his 1875 stay in Uganda) wrote books that praised the Baganda for their organizational skills and willingness to modernize. Stanley went further and attempted to convert the king to Christianity. Finding Kabaka Mutesa I apparently receptive, Stanley wrote to the Church Missionary Society (CMS) in London and persuaded it to send missionaries to Buganda in 1877. Two years after the CMS established a mission, French Catholic White Fathers also arrived at the king's court, and the stage was set for a fierce religious and nationalist rivalry in which Zanzibarbased Muslim traders also participated. By the mid-1880s, all three parties had been successful in converting substantial numbers of Baganda, some of whom attained important positions at court. When a new young kabaka, Mwanga, attempted to halt the dangerous foreign ideologies that he saw threatening the state, he was deposed by the armed converts in 1888. A four-year civil war ensued in which the Muslims were initially successful and proclaimed an Islamic state. They were soon defeated, however, and were not able to renew their effort.

The victorious Protestant and Catholic converts then divided the Buganda kingdom, which they ruled through a figurehead kabaka dependent on their guns and goodwill. Thus, outside religion had disrupted and transformed the traditional state. Soon afterwards, the arrival of competing European imperialists-- the German Doctor Karl Peters (an erstwhile philosophy professor) and the British Captain Frederick Lugard--broke the Christian alliance; the British Protestant missionaries urged acceptance of the British flag, while the French Catholic mission either supported the Germans (in the absence of French imperialists) or called for Buganda to retain its independence. In January 1892, fighting broke out between the Protestant and Catholic Baganda converts. The Catholics quickly gained the upper hand, until Lugard intervened with a prototype machine gun, the Maxim (named after its American inventor, Hiram Maxim). The Maxim decided the issue in favor of the pro-British Protestants; the French Catholic mission was burned to the ground, and the French bishop fled. The resultant scandal was settled in Europe when the British government paid compensation to the French mission and persuaded the Germans to relinquish their claim to Uganda.

With Buganda secured by Lugard and the Germans no longer contending for control, the British began to enlarge their claim to the "headwaters of the Nile," as they called the land north of Lake Victoria. Allying with the Protestant Baganda chiefs, the British set about conquering the rest of the country, aided by Nubian mercenary troops who had formerly served the khedive of Egypt. Bunyoro had been spared the religious civil wars of Buganda and was firmly united by its king, Kabarega, who had several regiments of troops armed with guns. After five years of bloody conflict, the British occupied Bunyoro and conquered Acholi and the northern region, and the rough outlines of the Uganda Protectorate came into being. Other African polities, such as the Ankole kingdom to the southwest, signed treaties with the British, as did the chiefdoms of Busoga, but the kinship-based peoples of eastern and northeastern Uganda had to be overcome by military force.

A mutiny by Nubian mercenary troops in 1897 was only barely suppressed after two years of fighting, during which Baganda Christian allies of the British once again demonstrated their support for the colonial power. As a reward for this support, and in recognition of Buganda's formidable military presence, the British negotiated a separate treaty with Buganda, granting it a large measure of autonomy and self-government within the larger protectorate under indirect rule. One-half of Bunyoro's conquered territory was awarded to Buganda as well, including the historic heartland of the kingdom containing several Nyoro (Bunyoro) royal tombs. Buganda doubled in size from ten to twenty counties (sazas), but the "lost counties" of Bunyoro remained a continuing grievance that would return to haunt Buganda in the 1960s.

Data as of December 1990