The Sao Civilisation

The Sao or So were an African civilisation that flourished from ca. the 6th century to as
late as the 15th century. The Sao lived by the Chari River south of Lake Chad in territory
that would later be part of Cameroon and Chad. They are the earliest people to have
left clear traces of their presence in the territory of modern Cameroon. Little is known
about the Sao's history, society, or culture. They may have originated in the Nile valley,
the Bilma oasis, or near Lake Chad. Sometime around the 10th century, invading
peoples conquered or absorbed the Sao. Today, several ethnic groups of northern
Cameroon and southern Chad claim descent from the civilisation.