Tanganyika Territory gained independence from Britain before becoming part of Tanzania three years later.

Tanganyika was a colonial territory in East Africa which was administered by the United Kingdom in various forms from 1916 until 1961. It was initially administered under military occupation. From 20 July 1922, it was formalised into a League of Nations mandate under British rule. From 1946, it was administered by the UK as a United Nations trust territory. It bordered British East Africa to the North East.

Tanzania, officially the United Republic of Tanzania, is a country in East Africa within the African Great Lakes region. It is bordered by Uganda to the northwest; 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. According to a 2024 estimate, Tanzania has a population of around 67.5 million, making it the most populous country located entirely south of the equator.