Battle of Mynydd Hyddgen

The Battle of Mynydd Hyddgen took place between the Welsh and English in June 1401. It was the first major victory by Owain Glyndŵr of the Welsh Revolt of 1400–1409. Its location was on the western slopes of Plynlimon, near the Ceredigion/Powys boundary. Glyndŵr, defending with a much smaller force, routed an attack of English and Flemish settlers and soldiers at a site on or close to Mynydd Hyddgen, a peak in the Ceredigion uplands.

The battle was significant in giving new impetus to the nascent rebellion, and provoking a punitive response from the English King, Henry IV. It is likely that Glyndŵr utilised the local geography to his advantage, perhaps drawing the forces into a trap using the natural draw of the land where a spring rises, buttressed by natural rock ramparts, although no confirmatory accounts of the battle exist, and the exact location is uncertain.