Answer
In 1409, English forces captured Glyndŵr's last strongholds, effectively ending the Welsh revolt led by Owain Glyndŵr. The revolt had begun in 1400 and had seen Glyndŵr crowned Prince of Wales. However, after a series of defeats, Glyndŵr's support dwindled, and he was forced to retreat to the mountains. The capture of his last strongholds marked the end of his rebellion and the restoration of English control over Wales.