Answer
Owain Glyndŵr, the last Welsh Prince of Wales, led a fierce rebellion against King Henry IV of England in the early 15th century. Glyndŵr's uprising aimed to restore Welsh independence and reaffirm his rightful claim to the principality. Despite initial successes and support from French allies, the rebellion eventually succumbed to the English forces after more than a decade of conflict, marking the end of an era of Welsh autonomy.