The history of Dacian warfare spans from c. 10th century BC up to the 2nd century AD in the region defined by Ancient Greek and Latin historians as Dacia. It concerns the armed conflicts of the Dacian tribes and their kingdoms in the Balkans. Apart from conflicts between Dacians and neighboring nations and tribes, numerous wars were recorded among Dacians too. https://en.wikipedia.org/wiki/Dacian_warfare
Burebista. Territories located north of the Danube were inhabited by Dacians, who are considered to have belonged to the Getae tribes, mentioned by Herodotus, that were a branch of Thracian people. The Dacian kingdom reached its peak between 82 and 44 BC during the reign of Burebista.