map of Julius Caesar's campaign in Adrian Sea, 48 BC.
<a href="//commons.wikimedia.org/wiki/User:Linguae" title="User:Linguae">User:Linguae</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span> based on <a href="//commons.wikimedia.org/wiki/File:Adriatic_Sea_Currents_2.svg" title="File:Adriatic Sea Currents 2.svg">File:Adriatic Sea Currents 2.svg</a>