Maximum extent of the Achaemenid Empire under Darius I
http://www.lib.utexas.edu/maps/historical/shepherd/persian_empire.jpg
http://www.reed.edu/humanities/hum110/assets/images/maps/fall/AchaemenidEmpirePersepolisetc.jpg
(2008)  Macedonian Legacies: Studies in Ancient Macedonian History and Culture in Honor of Eugene N. Borza, Regina Books, p. 239  ISBN:  978-1-930-05356-4. 
(2011)  A Companion to Ancient Macedonia, John Wiley and Sons, pp. 135−138, 342−345  ISBN:  978-1-44-435163-7. 
Used a blank map of the world from here.
This vector image was created by Ali Zifan.