England conquered Wales during the Middle Ages. The Normans, under William the Conqueror, took the eastern and southern regions in the twelfth century. William set up barons in these border areas, or “marches”, and gave them power that exceeded that of most other barons. This bred ambitions and a sense of autonomy among the Lords Marchers that would haunt the English crown for centuries. For good or ill, these barons played pivotal roles in the rebellions and politics of the medieval period.
In the late thirteenth century, Edward I completed the conquest of Wales. For the next century there were no large-scale rebellions, although minor insurrections periodically occurred. That the Welsh were hardly pacified was proven in 1400. That year marked the beginning of the great rebellion of Owain Glyn Dwr, which would be the final revolt of the Welsh against English rule.
Welsh streamed across England to join Owain’s revolt, abandoning their positions in English manors, courts and universities to do so.
Any of our ancestors living in London and other parts of England during this time were affected by this rebellion.