They consist in the fact that its territory is so completely hemmed in by Thrace from shore to shore, that the Byzantines have a perpetual and dangerous war continually on hand with the Thracians. For they are unable once for all to arm and repel them by a single decisive battle, owing to the number of their people and chiefs. For if they conquer one chief, three others still more formidable invade their territory. Nor again do they gain anything by consenting to pay tribute and make terms; for a concession of any sort to one brings at once five times as many enemies upon them. Therefore, as I say, they are burdened by a perpetual and dangerous war: for what can be more hazardous or more formidable than a war with barbarians living on your borders? Nay, it is not only this perpetual struggle with danger on land, but, apart from the evils that always accompany war, they have to endure a misery like that ascribed by the poets to Tantalus: for being in possession of an extremely fertile district, no sooner have they expended their labour upon it and been rewarded by crops of the finest quality, than the barbarians sweep down, and either destroy them, or collect and carry them off; and then, to say nothing of the loss of their labour and expense, the very excellence of the crops enhances the misery and distress of seeing them destroyed before their eyes. Still, habit making them able to endure the war with the Thracians, they maintained their original connexions with the other Greeks; but when to their other misfortunes was added the attack of the Gauls under Comontorius, they were reduced to a sad state of distress indeed.