Talk:Scoia'tael/@comment-1009967-20160430205659/@comment-28113040-20160430214937

I'm pretty sure it was implied that they go back even further than that.

"For her role in the coup, Francesca Findabair was made queen of Dol Blathanna, a free elven state, under the condition that she would openly denounce the violent actions of the Scoia'tael, while allowing them to continue to harass the Northern Kingdom."

That suggests that the Scoia'tael already existed long before the coup, and I'm pretty sure Iorveth implied somewhere that they were used by Nilfgaard before (plus it's been stated he's been fighting humans for about a century now, so that's probably also something to go by).