Zambia tributaries rise in Angola's central highlands. The edge of the Cuando River floodplain (not its main channel) forms Zambia's southwestern border, and via the Chobe River that river contributes very little water to the Zambezi because most is lost by evaporation. Two of the Zambezi's longest and largest tributaries, the Kafue and the Luangwa, flow mainly in Zambia. Their confluences with the Zambezi are on the border with Zimbabwe at Chirundu and Luangwa town respectively. Before its confluence, the Luangwa River forms part of Zambia's border with Mozambique. From Luangwa town, the Zambezi leaves Zambia and flows into Mozambique, and
Zambia and Regional Diplomacy liberation of their country during the years of exile. Zambia's policy of liberation through diplomacy and discreet support for African nationalist movements within the region is most poignant in the South African case. Zambia has also provided key support to the liberation struggles of nearby Zimbabwe from their colonial rulers in the 1960's to 1970's. Specifically, Zambia provided armed and diplomatic support to Zimbabwe African People's Union (ZAPU) and the Zimbabwe African National Union (ZANU) during their struggles against the British backed Rhodesian government in the Rhodesian Bush War. Zambia provided limited arms and training towards Zimbabwe's African nationalist movements,