Mezentio was the king of Algarve. A charismatic political and military leader, Mezentio was completely ruthless in his ambition to raise Algarve to supreme power in the world and take revenge on rival powers who had humbled Algarve in earlier wars. His decision to take back the Duchy of Bari precipitated the Derlavaian War. Mezentio initiated the use of Kaunians to fuel his army's "Special Magecraft", ordering the deaths of thousands. His country used this method to attack the island country of Kuusamo in an attempt to keep them from entering the war. Instead, he insured their entrance.