The Barbarian is a non-playable characters heavy unit of the Early Middle Ages. It will be used three provinces: Galgenschlucht, Todespass and Steilsturz. It has ability Last Stand, which gains attack and defense bonus for every unit with last stand that is killed. When these units with last stand ability are killed, every units will be stronger. It also gains bonus on rocks and unit bonus vs light units, but is still vulnerable to both ranged and artillery units. In a battle it looks like a berserker.
The best way to fight barbarians is to use their low defence to your advantage. Use Archers / Mounted Archers to bring them health down to very low (but don't kill them). Once their turn is passed to yours use your Archers to pick them off one by one until none is left. This is much better then killing them head on since they don't get a chance to use their ability when attacking while you can still one-shot them with 1-2 hit point left no matter how high is their attack and defence bonuses.