Battle of Mynydd Hyddgen

The Battle of Mynydd Hyddgen was a battle between the Welsh and English in June 1401. It was part of the Welsh revolt led by Owain Glyndŵr against English rule that lasted from 1400 to 1415. Its location was on the western slopes of Pumlumon, near the Ceredigion/Powys boundary.

The settlers were reinforced by a large force of English soldiers and Flemish mercenaries. This was Owain's early base as his rebellion started and spread. It is estimated that his force at this stage amounted to five hundred men, just a third of the attacking force and some records, such as the 'Annals of Owen Glyn Dwr' written by Gruffydd Hiraethog many years later in 1550 and based on earlier accounts that have not survived, put his force at just 120 men. It is thought that Owain's force would have been made up mostly of archers mounted on hill ponies that would have been well suited for travelling across boggy or mountainous regions.

Wikipedia