occupants of the Benue Valley. That was when kinship was later introduced to Tiv people by the European in the 1940s Benue. In 1879 their occupation of the riverbanks was about the same as in 1950. British forces entered Tivland from the east in 1906, when there was tension between Tiv and other minorities within the Benue valley. The Tiv said in 1950 that they had defeated this British force, then later invited the British in for negotiations. The southern area was penetrated from the south; what southern Tiv refer to as "the eruption" of the British there occurred in 1911. The Tiv came into contact with European culture during the colonial period. During November 1907 to spring 1908, an expedition of the Southern Nigeria Regiment led by Lieutenant-Colonel Hugh Trenchard came into contact with the Tiv. Trenchard brought gifts for the tribal chiefs. Subsequently, roads were built and trade links established between Europeans and the Tiv. But before construction of roads began, a missionary named Mary Slessor went throughout the region seeing to the people's needs. Social and political organization Most Tiv have a highly developed sense of genealogy, with descent being reckoned patrilineally. Ancestry is traced to an ancient individual named Tiv, who had two sons; all Tiv consider themselves a member either of Ichongo (descendants of son Chongo) or of Ipusu (descendants of son Pusu). Ichongo and Ipusu are each divided into several major branches, which in turn are divided into smaller branches. The smallest branch, or minimal lineage, is the ipaven. Members of an ipaven tend to live together, the local kin-based community being called the "tar". This form of social organisation, called a segmentary lineage, is seen in various parts of the world, but it is particularly well known from African societies (Middleton and Tait 1958). The Tiv are the best-known example in West Africa of a society of segmentary lineage, as documented by Laura Bohannan (1952) and by Paul and Laura Bohannan (1953); in East Africa, the best-known example is the Nuer, documented by E.E. Evans-Pritchard (1940). The Tiv had no administrative divisions and no chiefs nor councils. Leadership was based on age, influence and affluence. The leaders' functions were to furnish safe conduct, arbitrate disputes within their lineages, sit on moots and lead their people in all external and internal affairs. These socio-political arrangements caused great frustration to British attempts to incorporate the