A part of Southeast Africa, the territory of what is now Kenya has seen human habitation since the beginning of the Lower Paleolithic. The Bantu expansion from a West African center of dispersal reached the area by the 1st millennium AD. With the borders of the modern state at the crossroads of the Bantu, Nilo-Saharan and Afro-Asiatic ethno-linguistic areas of Africa, Kenya is a truly multi-ethnic state.
European and Arab presence in Mombasa dates to the Early Modern period, but European exploration of the interior began only in the 19th century. The British Empire established the East Africa Protectorate in 1895, from 1920 known as the Kenya Colony.
In the Second World War (1939–45) Kenya became an important British military base for successful campaigns against Italy in the Italian Somaliland and Ethiopia. The war brought money and an opportunity for military service for 98,000 men, called “askaris”. The war stimulated African nationalism. After the war, African ex-servicemen sought to maintain the socioeconomic gains they had accrued through service in the King’s African Rifles (KAR). Looking for middle-class employment and social privileges, they challenged existing relationships within the colonial state. For the most part, veterans did not participate in national politics, believing that their aspirations could best be achieved within the confines of colonial society. The social and economic connotations of KAR service, combined with the massive wartime expansion of Kenyan defence forces, created a new class of modernised Africans with distinctive characteristics and interests. These socioeconomic perceptions proved powerful after the war.