From the time AbaBemba established themselves as a distinct grouping to the time of the 21st Chitimukulu, the Bemba were said to have been ruled by a single Paramount Chief or King (Roberts, 1970, 1973; Tanguy, 1948). However, during the reign of the 22nd Chitimukulu at the end of the 18th century, AbaBemba became markedly more expansionist. Chitimukulu Mukuka wa Malekano started pushing AbaLungu (the Lungu people) out of the present-day Kasama area. When he had forced AbaLungu to move west and settle on the western side of the Luombe River, the geographical coverage of the Bemba Kingdom had grown to such extent that it was not practical to manage it from UluBemba. So, Chitimukulu Mukuka wa Malekano gave the newly acquired Ituna area to his young brother Chitundu as a separate Mwamba Kingdom, a tributary state of the Bemba Kingdom (Mushindo, 1977; Tanguy, 1948). Chitundu became Mwine Tuna, Mwamba I.