BattlefieldsBattle of Bryn Glas
Medieval

Battle of Bryn Glas

1402
Powys, Wales
Era
Medieval
Battle Type
Pitched Battle
Location
Powys, Wales
Status
Unregistered
The Combatants

Who Fought

Defeated
English (Herefordshire levy under Edmund Mortimer)
VS
Victor
Welsh (Owain Glyndwr)
Forces involved

Welsh: approx. 1,500; English: approx. 2,000 (Wikipedia, drawing on standard secondary accounts)

Outcome
Decisive Welsh victory; Edmund Mortimer was captured and later defected to Glyndwr's side, prolonging the Welsh revolt and destabilising English politics.
The Battle

History & Significance

The Battle of Bryn Glas (also known as the Battle of Pilleth) was a battle between the Welsh and English on 22 June 1402, near the towns of Knighton and Presteigne in Powys, Wales. It was part of the Glyndŵr rebellion of 1400-1415. It was an important victory for the Welsh under Owain Glyndŵr, as it resulted in the prolongation of the Welsh war of independence and the destabilisation of English politics for several years afterward.

Owain Glyndŵr's war of independence occurred against a background of instability in the English monarchy. King Richard II of England had become alienated from many of the nobles, and had been overthrown by Henry Bolingbroke, the Duke of Lancaster, who became Henry IV of England. In Wales and the Welsh Marches, there were still many supporters of the deposed Richard, who died in captivity in 1400. In that year, Reginald Grey, 3rd Baron Grey de Ruthyn, a supporter of the new King Henry, had unlawfully seized some of Glyndŵr's lands and falsely caused charges of treason to be brought against him. In response, Glyndŵr declared himself the true Prince of Wales, and began a rebellion.

After Glyndŵr gained early successes in 1400, King Henry led a punitive expedition into north Wales and appeared to have suppressed the revolt. However, Glyndŵr remained at large, and anti-Welsh legislation by Parliament ensured that few Welshmen had reason to support continued English rule. On 1 April 1401 (which was Good Friday), two brothers from Anglesey, Rhys ap Tudur and Gwilym ap Tudur, seized Conwy Castle by trickery. Glyndŵr himself won a victory over an army of English and Flemish settlers in Pembrokeshire at Mynydd Hyddgen in mid-Wales. These two events reinvigorated the rebellion. Henry led another punitive expedition into mid-Wales, but achieved nothing and his army suffered severely from bad weather.

Early in 1402, Glyndŵr's men ambushed and captured Grey of Ruthyn, who had indirectly caused the rebellion, and held him for ransom. In June, Glyndŵr himself was near Knighton, and only 12 miles (19 km) from Leominster, then an important English garrison and market town in the Welsh Marches. King Henry had appointed Henry Percy, widely known as "Hotspur", as his principal lieutenant and justiciar in North Wales and the adjacent Marches. Hotspur's uncle, the Earl of Worcester, held a similar appointment in the south. However, the force which confronted Glyndŵr near Knighton was a county levy of Herefordshire under Sir Edmund Mortimer.

Mortimer was uncle of the young Edmund de Mortimer, 5th Earl of March, and either of them had a better hereditary claim to be King of England than Henry. (The childless Richard II had declared Sir Edmund's brother and the young Edmund's father, Roger Mortimer, 4th Earl of March, to be heir apparent to the crown, but Roger had died the year before Richard was overthrown and none of the nobles supported his son's claim.) However, Sir Edmund Mortimer had so far loyally supported the new king. In any case, as a substantial holder of lands in Wales and on the borders, Mortimer had already suffered from the depredations of Glyndŵr's rebels and appeared to have much to lose should the revolt continue.

The ground

The ground they fought on

The site of Battle of Bryn Glas lies on Ludlow Rocks (Undifferentiated), bedrock that formed in the Ludlow. The rock here is mudstone, siltstone and sandstone.

Casualties & Losses
  • Welsh: approx. 200 killed; English: 600-1,100 killed
Questions & Answers

Frequently Asked Questions

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Monuments
The legally protected scheduled monuments around the location, each with its period, type and significance.
Battlefields
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Roman Britain
The Roman roads, forts and towns near here, and the Iron Age people who held the land before Rome arrived.
Civil War
The Civil War fighting, garrisons and recorded militaria in this area, woven into the arc of 1642 to 1651.
Geology
The bedrock beneath the site, its age and rock type, reaching back hundreds of millions of years.
Local Names
What the street and field names around here actually mean, and the history buried inside them.
Historical Maps
Ordnance Survey maps from the 1800s, layered over the location as it stands today.
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Protected heritage nearby

Scheduled Monuments near Battle of Bryn Glas

Castell Foel-Allt
Castell Foel-Allt
Scheduled monument · Medieval · ~0.5 mi

Castell Foel-Allt is a medieval motte and bailey castle situated in Wales and protected by Cadw under reference RD060. The monument comprises the characteristic earthwork elements of this fortification type: a prominent mound serving as the motte, accompanied by an adjoining bailey enclosure. The…

Alan Richards / CC BY-SA 2.0 / Wikimedia Commons
Mynachdy Moated Enclosure
Mynachdy Moated Enclosure
Scheduled monument · Medieval · ~1.7 mi

Mynachdy Moated Enclosure is a medieval moated site located in Wales and protected by Cadw under reference RD097. The monument comprises a roughly rectangular enclosure surrounded by a water-filled ditch, a characteristic defensive feature of high-status medieval dwellings and administrative cent…

Whatlep / CC BY-SA 2.0 / Wikimedia Commons
Offa's Dyke: Section extending 200m S to Pool House, Rhos-y-Meirch
Offa's Dyke: Section extending 200m S to Pool House, Rhos-y-Meirch
Scheduled monument · Early Medieval · ~1.9 mi

Offa's Dyke: Section extending 200m S to Pool House, Rhos-y-Meirch is an early medieval linear earthwork forming part of the substantial frontier monument that extends across the Welsh-English border. This particular section preserves evidence of the ditch and bank construction typical of the bro…

Tim Heaton / CC BY-SA 2.0 / Wikimedia Commons
Offa's Dyke: Section extending 2143m S from The Firs, Rhos-y-Meirch
Offa's Dyke: Section extending 2143m S from The Firs, Rhos-y-Meirch
Scheduled monument · Early Medieval · ~2.1 mi

Offa's Dyke is an early medieval linear earthwork extending 2143 metres south from The Firs at Rhos-y-Meirch in Wales. Built as a frontier defence and demarcation line, the dyke belongs to the tradition of monumental earthwork construction undertaken along the Anglo-Saxon and Welsh border. This p…

Jeff Buck / CC BY-SA 2.0 / Wikimedia Commons
Offa's Dyke: Section from Whitton-Presteigne Road to River Lugg
Offa's Dyke: Section from Whitton-Presteigne Road to River Lugg
Scheduled monument · Early Medieval · ~2.1 mi

Offa's Dyke: Section from Whitton-Presteigne Road to River Lugg is an early medieval linear earthwork that forms part of the most extensive frontier defence constructed in Dark Age Britain. This section extends across the borderlands of Wales, where the underlying Ludlow rocks—a sequence of mudst…

Richard Webb / CC BY-SA 2.0 / Wikimedia Commons
Offa's Dyke: Section extending through Great Ffrydd Wood 1693m S to footpath leading to Woodhouse Lane
Offa's Dyke: Section extending through Great Ffrydd Wood 1693m S to footpath leading to Woodhouse Lane
Scheduled monument · Early Medieval · ~2.2 mi

Offa's Dyke: Section extending through Great Ffrydd Wood 1693m S to footpath leading to Woodhouse Lane is an early medieval linear earthwork constructed during the reign of King Offa of Mercia in the late 8th century. This particular section runs through Great Ffrydd Wood, where the underlying Lu…

Jeremy Bolwell / CC BY-SA 2.0 / Wikimedia Commons
Glog Camp
Scheduled monument · Prehistoric · ~1.3 miles
Offa's Dyke: Section extending 1125m SW to Gilfach Wood
Scheduled monument · Early Medieval · ~1.9 miles
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Sources