The Dacians were a warlike people living in and around the Carpathian mountains. The Greeks called them the Getae.
The main Dacian warrior type was armed with a spear and shield and maybe a sword or knife. They fielded quite a lot of archers but the main weapon feared by the Romans was a two handed scythe type weapon, the dreaded Falx. Capable of taking off a mans arm in one blow or piercing the top of helmets as it came down over the Roman scutum.
The Dacians were very good craftsman and metal smiths and so nobles would wear armour of mail or scales and elaborate helmets. Quite a bit of captured Roman equipment would be used also.
In 28mm scale, they are an ideal way to start a Saga force or bulk out a Roman army for WAB or Hail Caesar, Infamy, Infamy or Clash of Spears.