ON THIS DAY: 917 – Byzantine–Bulgarian Wars: Bulgarians led by Tsar Simeon I drove the Byzantines out of Thrace with a decisive victory in the Battle of Achelous (pictured).Click here to read more.

ON THIS DAY: 917 – Byzantine–Bulgarian Wars: Bulgarians led by Tsar Simeon I drove the Byzantines out of Thrace with a decisive victory in the Battle of Achelous (pictured).

Click here to read more.