Map of the Basra region during the Zanj Rebellion. Regional boundaries are derived from al-Muqaddasi, pp. 54-55. Derivative of File:Zanj Rebellion.svg.
Works cited:

Al-Muqaddasi, Muhammad ibn Ahmad. The Best Divisions for Knowledge of the Regions. Trans. Basil Collins. Reading: Garner Publishing Limited, 2001. ISBN 1-85964-136-9
Own work
Ro4444