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The Odrysian Kingdom was the first of many Thracian Unions, and consisted of most of what is now Bulgaria, from the Black Sea, to the Danube. It encompassed many tribes such as the Odrysian's (go figure) the Getae, and other various independent Thracian Tribes. They combined Hellenistic and "barbarian" warfare together, using the phalanx, but also using heavy and light infantry. They were well known for their cavalry power, as well.