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
Augustus came into conflict with Dacia after they sent envoys offering their support against Mark Antony in exchange for "requests", the nature of which have not been recorded. Augustus rejected the offer and Dacia gave their support to Antony.
In ancient geography, especially in Roman sources, Dacia (/ˈdeɪʃiə, -ʃə/) was the land inhabited by the Dacians. The Greeks referred to them as the Getae, which were specifically a branch of the Thracians north of the Haemus Mons (the Balkan Mountains).