The uprising was initially very successful and rapidly gained control of large areas of Wales, but it suffered from key weaknesses – particularly a lack of artillery, which made capturing defended fortresses difficult, and of ships, which made their coastlands vulnerable.
O alzamento foi exitoso ó comezo, e axiña gañou o control de grandes áreas de Gales, pero sufriu por mor da falta de artillaría, que facía que capturar fortificacións fose moi difícil, e de barcos, que facía as súa liña costeira vulnerable.