The native British retained a degree of autonomy in Wales throughout the Roman occupation. Little is recorded about them that can be established as firm historical fact though it is possible that the Silures, Ordovices and Demetae continued to be ruled by tribal chieftains within the Roman administration. Towards the end of this period an influx of Irish from the west and British from the east began to test these tribal boundaries and new ones emerged based, initially, on the old tribes, but subsequently developing into four main kingdoms - Gwent, Gwynedd, Powys and Deheubarth.