I cannot tell you exactly, but I would refer you on to Julius Caesar's War Commentaries against Germany. He would have undoubtedly stated something which would be a reliable source.
By contrast, Boadicea in Britain would be a good comparison. Even the squaws of the American Indians. They were inevitably more vicious than the men in their societies, because it was their homelands that were being seized and their lives and those of the children being threatened.
That is the case for creatures in the wild, and they would have participated with the men to make sure this point of view was hammered heavily home with the clout of religious fervour and painful punishments meted out to enemy captives.
