African civilizations from 500 BC to 1500 AD were influenced by trade, technology, and religion. Key developments included the spread of Islam through trans-Saharan trade routes connecting North and sub-Saharan Africa. Major West African kingdoms like Ghana, Mali, and Songhai grew wealthy from gold and salt trade. The Bantu migrations influenced the spread of Bantu languages in sub-Saharan Africa between 500 BC to 1500 AD. The Kingdom of Zimbabwe rose as a center of wealth and trade in Southeast Africa between the Zambezi and Limpopo Rivers.