The Byzantine army takes oath before the battle of Anchialus against the Bulgarians in 917
John Skylitzes
2015-07-01
<a href="//commons.wikimedia.org/wiki/File:AdrianopleConquestByzSoldBGhistory.jpg" title="File:AdrianopleConquestByzSoldBGhistory.jpg">File:AdrianopleConquestByzSoldBGhistory.jpg</a>