I recently discovered that Dan Carlin has a series on this topic, "Hardcore History 60 - The Celtic Holocaust". I just listened through, and it's pretty solid.

I recently discovered that Dan Carlin has a series on this topic, "Hardcore History 60 - The Celtic Holocaust". I just listened through, and it's pretty solid. Based on the number of deaths and attitude, I think "genocide" is pretty fine, but he makes it clear that the Gauls actually had a fighting chance in their fights. In some timelines, the Romans get sent home with a bloody nose and no intention to return for a while.