Dii

The Dii ( /ˈdaɪaɪ/; Ancient Greek: Δίοι) were an independent Thracian tribe, swordsmen, who lived among the foothills of Mount Rhodope in Thrace. They often joined the ranks of organized armies as mercenaries or volunteers. Thucydides declared that they were the most warlike infantry in Sitalkes' army.