Shashe River Shashe is a sand filled channel, with extensive alluvial aquifers in the river channel and below the alluvial plains. These supply water for a number of irrigation schemes including Sibasa and Shashi. More than two million years ago, the Upper Zambezi River used to flow south through what is now the Makgadikgadi Pan (presently a vast seasonal wetland) to the Shashe River and thence the Limpopo River. There is a road bridge and a rail bridge south of Francistown. The lower Shashe River forms the border between Botswana and Zimbabwe and is unbridged. However, at Tuli, both sides of the
British South Africa Company Zimbabwe, and North-Eastern Rhodesia (now part of Zambia) and Portuguese Mozambique. It divided Manica, granting the western portion to the British South Africa Company. It also fixed the boundaries between the BSAC-administered territory of North-Western Rhodesia (now in Zambia), and Portuguese Angola. The northern border of the British territories was agreed as part of an Anglo-German Convention in 1890. The border between the British Central Africa Protectorate and the territory of the British South Africa Company in what is today Zambia was fixed in 1891 at the drainage divide between Lake Malawi and the Luangwa River. The terms of the