Polybius also asserts that certain of the Celts fought naked, "The appearance of these naked warriors was a terrifying spectacle, for they were all men of splendid physique and in the prime of life."[REF]
Diodorus Siculus, in his 1st-century History had this to say about Celtic head-hunting: They cut off the heads of enemies slain in battle and attach them to the necks of their horses.