Tanzania (/ˌtænzəˈniːə/ TAN-zə-NEE-ə; Swahili: [tanzaˈni.a]), officially the United Republic of Tanzania (Swahili: Jamhuri ya Muungano wa Tanzania), is a country in East Africa within the African Great Lakes region. It borders Uganda to the north; Kenya to the northeast; the Indian Ocean to the east; Mozambique and Malawi to the south; Zambia to the southwest; and Rwanda, Burundi, and the Democratic Republic of the Congo to the west. Mount Kilimanjaro, Africa's highest mountain, is in northeastern Tanzania. According to the 2022 national census, Tanzania has a population of nearly 62 million, making it the most populous country located entirely south of the equator.

Many important hominid fossils have been found in Tanzania, such as 6-million-year-old Pliocene hominid fossils. In the Stone and Bronze Age, prehistoric migrations into Tanzania included Southern Cushitic speakers who moved south from present-day Ethiopia; Eastern Cushitic people who moved into Tanzania from north of Lake Turkana about 2,000 and 4,000 years ago; and the Southern Nilotes, including the Datoog, who originated from the present-day South Sudan–Ethiopia border region between 2,900 and 2,400 years ago. These movements took place at about the same time as the settlement of the Mashariki Bantu from West Africa in the Lake Victoria and Lake Tanganyika areas. In the late 19th century, the mainland came under German rule as German East Africa, and this was followed by British rule after World War I when it was governed as Tanganyika, with the Zanzibar Archipelago remaining a separate colonial jurisdiction. Following their respective independence in 1961 and 1963, the two entities merged in 1964 to form the United Republic of Tanzania. Tanganyika joined the British Commonwealth and Tanzania remains a member of the Commonwealth as a unified republic.

Tanzania is mountainous and densely forested in the north-east, where Mount Kilimanjaro is located. Three of Africa's Great Lakes are partly within Tanzania. To the north and west lie Lake Victoria, Africa's largest lake, and Lake Tanganyika, the continent's deepest lake, known for its unique species of fish. To the south lies Lake Malawi. The eastern shore is hot and humid, with the Zanzibar Archipelago just offshore. The Menai Bay Conservation Area is Zanzibar's largest marine protected area. The Kalambo Falls, located on the Kalambo River at the Zambian border, is the second-highest uninterrupted waterfall in Africa. Tanzania is one of the most visited tourist destinations for safaris.

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The Battle of Jinja was a battle of the Uganda–Tanzania War that took place on 22 April 1979 near and in the city of Jinja, Uganda between Tanzanian and allied Uganda National Liberation Front forces, and Ugandan troops loyal to Idi Amin. The Tanzanians and the UNLF men met slight resistance and captured Owen Falls Dam and the town of Jinja.

Idi Amin had seized power in Uganda in 1971 and established a brutal dictatorship. Seven years later he attempted to invade neighbouring Tanzania to the south. The attack was repulsed, and the Tanzanians launched a counter-attack into Ugandan territory. After a number of battles, Amin's regime and military largely collapsed, and Kampala, the capital, was seized by the Tanzanians and the UNLF. Ugandan troops fled to the eastern city of Jinja, whose capture was entrusted to a force consisting of the Tanzanian 208th Brigade and members of the UNLF. (Full article...)