Answer
Glyndŵr's independent Welsh state lasted for five years, from 1400 to 1405. Led by Owain Glyndŵr, the Welsh rebels fought against English rule and established a parliament in Machynlleth. However, after several military setbacks, Glyndŵr's forces were defeated, and he was forced into hiding. The English regained control of Wales, and Glyndŵr's dream of an independent Welsh state was extinguished.