 | Thrace is a historical and geographic area in southeast Europe, centered on the borders of Bulgaria, Greece, and Turkey. In antiquity it was also referred to as Europe, prior to the term describing the whole continent.
Thrace designates a region bounded by the Balkan Mountains on the north, Rhodope Mountains and the Aegean Sea on the south, and by the Black Sea and the Sea of Marmara on the east. It comprises southeastern Bulgaria, northeastern Greece, and part of Turkey. The biggest part of Thrace is part of present day Bulgaria. Thracians were divided into many tribal groups. The region was controlled by the Persian Empire at its greatest extent, and Thracian soldiers were known to be used in the Persian armies. |  Thracians were known to accompany Alexander the Great when he crossed the Hellespont. |