History of the Peloponnesian War

It was the master of this empire that now prepared to take the field. When everything was ready, he set out on his march for Macedonia, first through his own dominions, next over the desolate range of Cercine that divides the Sintians and Paeonians, crossing by a road which he had made by felling the timber on a former campaign against the latter people.

Passing ever these mountains, with the Paeonians on his right and the Sintians and Maedians on the left, he finally arrived at Doberus, in Paeonia,

losing none of his army on the march, except perhaps by sickness, but receiving some augmentations, many of the independent Thracians volunteering to join him in the hope of plunder; so that the whole is said to have formed a grand total of a hundred and fifty thousand.

Most of this was infantry, though there was about a third cavalry, furnished principally by the Odrysians themselves and next to them by the Getae. The most warlike of the infantry were the independent swordsmen who came down from Rhodope; the rest of the mixed multitude that followed him being chiefly formidable by their numbers.