 The Lozvi even repelled Portuguese colonists from some of their inland posts.In south-western Zimbabwe (now Matabeleland) and adjacent parts of present-day Botswana, Kalanga states survived for more than another century.The fall of the Kingdom of Butua came as a result of a series of invasions, beginning with the Bangwato Kgosi Kgari's ill-fated incursion of around 1828 and culminating in the onslaught of Mzilikazi's Amandebele.