There were many reasons why they left or departed KwaZulu-Natal, one of the common reasons was that they have always been attacked by the Zulu clan to the south, who were in their early stages of forming the Zulu Kingdom by invading or killing other clans. At that time, the Zulu were not an ethnic group but were a clan, like the Mazibuko clan, who both spoke an ancient dialect of the Zulu language. The Mazibuko Clan were harassed again and again by the Zulu clan until they finally decided to leave KwaZulu-Natal and to go and found a new kingdom for themselves in Southern Mozambique. Upon arrival in coastal Mozambique, they adopted Xitsonga language and culture and changed their clan name from Mazibuko clan to Mabunda clan or also known in Tsonga as Vahlavi. However, some retain the Mazibuko surnames, while others preferred Mabunda. The Mabunda clan ruled southern Mozambique for more than 110 years and were finally expelled from Mozambique by the invading armies of Soshangane between 1820 and 1825.