The movements of al-Muwaffaq through the province of al-Ahwaz during his second campaign against the Zanj, in 881 AD. These movements are detailed by al-Tabari, pp. 34-39.
Image is a derivative of File:Al-Ahwaz ca. 875.svg.
Background topography taken from DEMIS Mapserver, which are public domain.

Works Cited:

Al-Tabari, Abu Ja'far Muhammad ibn Jarir. The History of al-Tabari, Volume XXXVII: The 'Abbasid Recovery. Trans. Philip M. Fields. Ed. Ehsan Yar-Shater. Albany, NY: State University of New York Press, 1985. ISBN 0-88706-054-4
Own work
Ro4444