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How did Llywelyn ap Gruffudd die in 1282?

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Llywelyn ap Gruffudd, the prince of Wales, died on December 11, 1282, after being killed in a skirmish near Builth, Wales.12

Following a period of deteriorating relations between Llywelyn and Edward I, Llywelyn had placed himself at the head of a rebellion for national independence earlier that year. His death in combat marked a turning point in the conflict; although his brother, David ap Gruffudd, attempted to sustain the resistance for several more months, the uprising ultimately collapsed in the summer of 1283, leading to the total subjugation of Wales under English rule.12