History of the Peloponnesian War

Beginning therefore with the Odrysians, he levied first those Thracians that inhabit on this side the mountains Haemus and Rhodope, as many as were of his own dominion, down to the shore of the Euxine Sea and the Hellespont. Then beyond Haemus he levied the Getes and all the nations between Ister and the Euxine Sea. The Getes and the people of those parts are borderers upon the Scythians and furnished as the Scythians are, all archers on horseback.

He also drew forth many of those Scythians that inhabit the mountains and are free states, all swordsmen, and are called Dii, the greatest part of which are on the mountain Rhodope; whereof some he hired, and some went as voluntaries.

He levied also the Agrianes and Laeaeans and all other the nations of Paeonia in his own dominion. These are the utmost bounds of his dominion, extending to the Graaeans and Laeaeans, nations of Paeonia, and to the river Strymon, which, rising out of the mountain Scomius, passeth through the territories of the Graaeans and Laeaeans, who make the bounds of his kingdom toward Paeonia and are subject only to their own laws.

But on the part that lieth to the Triballians, who are also a free people, the Treres make the bound of his dominion, and the Tilataeans. These dwell on the north side of the mountain Scomius and reach westward as far as to the river Oscius, which cometh out of the same hill Nestus and Hebrus doth; a great and desert hill adjoining to Rhodope.