evidence: British missionary and trading activity increased in the area around Lake Nyasa in the mid-1800s, and Britain declared a protectorate, called British Central Africa, over what is now Malawi in 1891 and eliminated various political entities that sought to retain their autonomy over the subsequent decade. The British renamed the territory Nyasaland in 1907 and it was part of the colonial Federation of Rhodesia and Nyasaland - including present-day Zambia and Zimbabwe - from 1953 to 1963 before gaining independence as Malawi in 1964. [...] Geography - note landlocked; Lake Nyasa, some 580 km long, is the country's most prominent physical feature; it contains more fish species than any other lake on earth [...] Malawi-Tanzania: dispute with Tanzania over the boundary in Lake Nyasa (Lake Malawi) and the meandering Songwe River; Malawi contends that the entire lake up to the Tanzanian shoreline is its territory, while Tanzania claims the border is in the center of the lake; the conflict was reignited in 2012 when Malawi awarded a license to a British company for oil exploration in the lake