Measuring Gwynedd's resistance in proportion

The World Heritage title's specific reference to Gwynedd prompts a correction to an England-versus-Wales account of the conquest. Resistance centred on a particular part of North Wales, including Anglesey and Snowdonia, while much of Wales supported Edward I. A twenty-to-one population ratio suggested in comments is rejected for England against Wales as a whole because the medieval population difference was smaller than today's. A disparity of that order is treated as possible when Gwynedd is compared with a coalition drawing on English and Welsh support, food from Ireland, and some Scottish knights. The figure is offered as a tentative comparison without a population calculation. Crediting Gwynedd specifically makes its prolonged resistance more striking. Modern impressions of the mountainous region and its hardy communities prompt a personal reflection on that resistance.