evidence: Tanzania said on Thursday its armed forces were ready to protect the country against any foreign threat to its territory, raising the stakes in an escalating border dispute with Malawi. Tanzania is embroiled in a territorial wrangle with Malawi over the ownership of Lake Nyasa, which is known as Lake Malawi in the neighboring country. Malawi, which sits to the west of Africa's third-largest lake, claims the entire northern half of the lake while Tanzania, to the east, says it owns half of the northern area. The southern half is shared between Malawi and Mozambique.