The history of Zambia experienced many stages from colonization to independence from Britain on October 24, 1964. Northern Rhodesia became a British sphere of influence in the present-day region of Zambia in 1888, and was officially proclaimed a British protectorate in 1924. After many years of suggested mergers, Southern Rhodesia, Northern Rhodesia, and Nyasaland were merged into the British Federation of Rhodesia and Nyasaland. By 1960, British Prime Minister, Harold Macmillan, declared that the age of colonial rule in Africa was ending. Finally, in December 1963, the federation was dissolved, and the Republic of Zambia was formed out of Northern Rhodesia on October 24, 1964. History Prehistoric era Archaeological excavation work on the Zambezi Valley and Kalambo Falls show a succession of human cultures. In particular, ancient camping site tools near the Kalambo Falls have been radiocarbon dated to more than 36,000 years ago. The fossil skull remains of Broken Hill Man, dated between 300,000 and 125,000 years BC, further shows that the area was inhabited by early humans. Khoisan and Batwa The area of modern Zambia is known to have been inhabited by the Khoisan and Batwa peoples until around AD 300 when migrating Bantu began to settle around these areas. It is believed that the Khoisan people groups originated in East Africa and spread southwards around 150,000 years ago. The Twa people were split into two groups: The Kafwe Twa lived around the Kafue flats while the other, The Lukanga Twa lived around the Lukanga Swamp. Many of the ancient rock arts in Zambia like the Mwela Rock Paintings, Mumbwa Caves, and Nachikufu Cave are attributed to these early hunter-gatherer groups. The Khoisan, and more especially the Twa, formed a patron-client relationship with farming Bantu peoples across central and southern Africa but were eventually either displaced by or absorbed into the Bantu groups. The Bantu (Abantu) The Bantu people or Abantu (meaning people) are an enormous and diverse ethnolinguistic group that comprise the majority of people in much of East, Southern and Central Africa. Due to Zambia's location at the crossroads of Central Africa, Southern Africa, and the African Great Lakes, the history of the people that constitute modern Zambians is a history of these three regions. Many of the historical events in these three regions happened simultaneously. Thus, Zambia's history, like many African nation's histories, cannot be presented perfectly chronologically. The early history of the peoples of