By early Nero's reign, most of Britain south of a line between the Mersey and Humber had entered Britannia, while the Brigantes and Parisi remained nominally independent in the north. The Brigantes occupied much of northern England; the Parisi lived in what is now the East Riding of Yorkshire. Both may have been client kingdoms under Roman protection. The arrangement carried a succession condition: Rome expected to absorb the territory when its ruler died.
Notable Point · 13:32-14:23
The Brigantes, the Parisi, and Roman client kingdoms
The review explains how northern peoples could remain nominally independent under rulers whose kingdoms were expected eventually to pass to Rome.