Maximum extent of the Achaemenid Empire under Darius I
This vector image was created by <a href="//commons.wikimedia.org/wiki/User:Ali_Zifan" class="mw-redirect" title="User:Ali Zifan">Ali Zifan</a>.
CC BY-SA 4.0
<ul><li><a rel="nofollow" class="external free" href="http://www.lib.utexas.edu/maps/historical/shepherd/persian_empire.jpg">http://www.lib.utexas.edu/maps/historical/shepherd/persian_empire.jpg</a></li>
<li><a rel="nofollow" class="external free" href="http://www.reed.edu/humanities/hum110/assets/images/maps/fall/AchaemenidEmpirePersepolisetc.jpg">http://www.reed.edu/humanities/hum110/assets/images/maps/fall/AchaemenidEmpirePersepolisetc.jpg</a><br></li>
<li><cite class="book" style="font-style:normal">(2008) <i> <a rel="nofollow" class="external text" href="https://books.google.nl/books?id=uuwTAQAAMAAJ&amp;q=persians+conquered+paeonia&amp;dq=persians+conquered+paeonia&amp;hl=nl&amp;sa=X&amp;ved=0CCsQ6AEwAjgKahUKEwj356zSqYLJAhUFeA8KHb0dAHU">Macedonian Legacies: Studies in Ancient Macedonian History and Culture in Honor of Eugene N. Borza</a></i>, Regina Books, p. 239  <small><a href="https://en.wikipedia.org/wiki/International_Standard_Book_Number" class="extiw" title="en:International Standard Book Number">ISBN</a>:  <a href="//commons.wikimedia.org/wiki/Special:BookSources/978-1-930-05356-4" title="Special:BookSources/978-1-930-05356-4">978-1-930-05356-4</a>. </small></cite></li>
<li><cite class="book" style="font-style:normal">(2011) <i> <a rel="nofollow" class="external text" href="https://books.google.nl/books?id=QsJ183uUDkMC&amp;pg=PA345&amp;lpg=PA345&amp;dq=Achaemenid+Persians+ruled+balkans&amp;source=bl&amp;ots=K7qasgPG1K&amp;sig=lkiajbVuNcHEbI5Lz3MnvIUBG1U&amp;hl=nl&amp;sa=X&amp;ei=sb6RVP2qHoPUaqeGgZgE&amp;ved=0CEkQ6AEwBQ#v=onepage&amp;q=Achaemenid%20Persians%20ruled%20balkans&amp;f=false">A Companion to Ancient Macedonia</a></i>, John Wiley and Sons, pp. 135−138, 342−345  <small><a href="https://en.wikipedia.org/wiki/International_Standard_Book_Number" class="extiw" title="en:International Standard Book Number">ISBN</a>:  <a href="//commons.wikimedia.org/wiki/Special:BookSources/978-1-44-435163-7" title="Special:BookSources/978-1-44-435163-7">978-1-44-435163-7</a>. </small></cite></li></ul>
Used a blank map of the world from <a class="external text" href="https://upload.wikimedia.org/wikipedia/commons/0/03/BlankMap-World6.svg">here</a>.