So the divida et conquera part had pretty much been already done by the Gauls themselves for the considerable delight of the Romans ? Heh.

So then what about the early Roman period, when the Gauls presumably hadn't yet mangled each other to such an extent and the Romans were still waging war with part-time citizen-soldiers (albeit very good ones) ? The Romans seemed to be fairly able to push the Celts out of Northern Italy and probably also from some other regions, and I'm under the impression they tended to win the battles more often than not back then too...