Much has been speculated on where the mercenaries who call themselves Thracians hail from originally. One point that can be agreed upon by all that have done research is that they definitely come from some place other than Weyland.
So, from whence come the Thracians? Their own oral history, or at least the part that they share with others, is muddled. But their oral history and the various written records from the times that they first appeared are clear at least on when and where they first appeared. Three ships of Thracian warriors and their families limped into the harbor at Freeport late afternoon on the second day of the Eighth month in the 920th year in the era of the High Kings. Most of the accounts also state that they initially were grim, but reserved. They caused no undue trouble in the city while they bartered for foodstuffs and medicines. The three ships were later followed by more ships of refugees. Accounts of exactly how many more ships range from five to twelve vessels.
Eventually the warriors began to offer their services to various lords and city governments and the beginnings of the Thracian mercenary companies were formed. It is generally believed, though never confirmed by the Thracians, that these early companies were based on familial ties. From these small beginnings the companies expanded beyond native Thracians by recruitment, and after the death of High King Caran, by the use of press gangs.
These regiments, ten in total, are each formed of ten companies. The companies consist of ten cohorts, each cohort ideally containing sixty men. It can easily be seen that the Thracians are now a formidable army in it's own right. Strangely they never have bonded together to fight as one army. They have historically preferred to fight as sell swords under a patron in units as small as a cohort. Thracian companies have often opposed each other in skirmishes and battles, apparently not seeing that as unusual behavior.
The question still remains as to where they first came from and why they came to Weyland. Initial fears that they came as the advance force of an unknown foe have receded. Instead all evidence points to the Thracians fleeing from some other, more superior force after a long and protracted war. From my own research I believe this force was a religious theocracy that had conquered all of the Thracians homeland. This unnamed theocracy was, and still is, so feared by the Thracians I can find no mention of their name.