Historically the autocephalous Sena people were those between the two large cultures of
Shona people – a major ethnic group of Zimbabwe, and the
Nyanja-Chewa people – a major ethnic group of Malawi and Mozambique. 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. In 1514, Antonio Fernandez confirmed there were rich goldfields in middle Zambezi valley, the traditional home of Sena people, and the Portuguese interest in colonizing this region grew. Starting with the 16th century,
Portuguese traders, farmers and
missionaries arrived in the Zambezi valley (stations in Sena, Tete, Zumbo, Quelimane). The Portuguese settlers built farm estates in the river valleys, working them with African labor which included the Sena people. The interaction with the Portuguese settlers since the 1500s through the contemporary times have led to the Sena people absorbing many Portuguese customs. The gold trade was lucrative, and of interest to both Arab traders and the Portuguese. By 1542, the Arabs who were established in northeast Africa, the
Horn of Africa and along the
Swahili coast regions of Africa had established alternate routes for the gold, bypassing the Portuguese towns in Mozambique coast and the
Island of Mozambique. In the 17th and 18th century, conflicts grew as did new causes for it. For example, the ivory demand and the ivory exports from Mozambique grew, followed by the demand for slaves outside Africa ravaging the Zambesi valley people as well as all others in the rivers of Sena region. ;Slavery The violence and capture of human beings to be sold as slaves grew in late 18th century, and both Islamic and Portuguese official documents of that era refer to slaves as
Kafirs. This volume of slave capture and trading increased to a point where it caused major social disorder, when the governor of Mozambique issued an order to stop this abuse, curtail the movement of captured human beings, and end the slave trading that was supplying people across the
Atlantic Ocean. In August 1792, states Capela, the Mozambique governor issued an order that, "no more Kafirs will be exported from the Rivers of Sena". These developments stabilized the lives and family units of the Sena people and other ethnic groups in the Zambesi valley as well as the rest of Africa. During the scramble for Africa the weakened Portuguese crown leased this region to British companies, which built the railway connections between the
Indian Ocean and their colonies, in this case the TZR,
Trans-Zambezi-Railway, between
Beira and
Njassaland/Malawi via Sena. Once Portugal under
Salazar during the 1940s had gained control over the region, then it introduced forced cotton growing and forced labor "contracts" with British colonies. ==Colonial and civil wars==