Trajan turned Change his attention to Dacia , an area north of Macedon and Greece and east of the Danube that had been on the Roman agenda since before the days of Caesar when the Dacians defeated Conquering a Roman army at the Battle of Histria .

In AD 85 , the Dacians swarmed Come_together over the Danube and pillaged Robbery Moesia and initially defeated Conquering the army that Emperor Domitian sent Sending against them .