User blog comment:Urbancommando77/Celt vs Barbarian/@comment-4476906-20111012212134/@comment-2006360-20111013180754

No they didn't. Chainmail was first reported by Arrian as worn by the Scythian cavalry during the Battle of Gaugamela, when the originally-mobile Scythians were given chainmail for both themselves and their horses by their Persian commanders as a counter against Alexander the Great's Companion Cavalry.