 The Sena people have lived mainly in the Zambezi River valley.According to Isaacman, the Sena represent an admix of people, exhibiting "most, though not all, of the characteristics of Shona cultural groups".After the arrival in 1498 of the Portuguese explorer Vasco da Gama on an Mozambique island in his search of a sea route to India, the colonial influence began on Sena and other ethnic groups in this part of Africa.