History of Mozambique
Mozambique's first inhabitants were San hunter and gatherers, ancestors of the Khoisani peoples. Between the first and fourth centuries CE, waves of Bantu-speaking peoples migrated from the north through the Zambezi River valley and then gradually into the plateau and coastal areas. The Bantu were farmers and ironworkers.
When Vasco da Gama, exploring for Portugal, reached the coast of Mozambique in 1498, Arab trading settlements had existed along the coast and outlying islands for several centuries, and political control of the coast was in the hands of a string of local sultans. Most of the local people had embraced Islam. The region lay at the southernmost end of a traditional trading world that encompassed the Red Sea, the Hadhramaut coast of Arabia and the Indian coast, described in the 1st century coasting guide that is called the Periplus of the Erythraean Sea.
From about 1500, Portuguese trading posts and forts became regular ports of call on the new route to the east. 'Mozambique' first described a small coral island at the mouth of Mossuril Bay, then the fort and town on that island, São Sebastião de Moçambique, and later extended to the whole of the Portuguese colonies on the east coast of Africa. The square fort at the northern extremity of the island was built in 1510 entirely of ballast stone brought from Portugal.