I have a big problem with the barbarian tribe of Dacia. During my campaign I managed to conquer Segestica and Salonae from the Greeks. Since then I've bordered Dacia and they keep sending multiple stacks with silver experienced elite troops... I cannot even defeat them in cities with my best Roman troops, they're too numerous and too good. Now they're even sending stacks to Italy and Greece. I didn't see them invading in previous campaign, but they're a serious problem to my glorious empire.
Does anyone know a particular strategy to defeat these one-eyed monstrous giants?
Current campaign (5 stacks can be counted):
I'm afraid there is no way other than blitzing their cities. But that will interrupt my wars with Greece, Sparte and Macedon.