The Royalist defeat at Y Dalar Hir halted the spread of the Second English Civil War rebellion in North Wales by capturing its principal leader.
Key Facts
- Date
- 5 June 1648
- Royalist force size
- 250–300 cavalry and foot
- Royalist commander
- Sir John Owen of Clenennau
- Parliamentarian commander
- Colonel George Twisleton
- Location
- Shore of the Menai Straits near Llandegai, Caernarfonshire
- Outcome
- Royalists scattered; Owen captured
Location
Cause → Event → Consequence
During the Second English Civil War, leading Welsh Royalist Sir John Owen of Clenennau sought to raise North Wales in rebellion against Parliament. He mustered 250–300 cavalry and foot, and on 3 June 1648 defeated local militia near Caernarfon before besieging Caernarfon Castle, threatening to extend the Royalist uprising across the region.
On 5 June 1648, Colonel George Twisleton, the Parliamentarian governor of Denbigh, confronted Owen's Royalist force at Y Dalar Hir on the shore of the Menai Straits near Llandegai, Caernarfonshire. Though little more than a skirmish, the engagement ended in the complete scattering of the Royalist troops and the capture of Sir John Owen himself.
Owen's capture at Y Dalar Hir effectively ended the Royalist rebellion in North Wales. Without its principal leader, the movement could not sustain momentum, and the wider threat of the uprising spreading through the region was suppressed, giving Parliament firm control over North Wales for the remainder of the conflict.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Sir John Owen of Clenennau.
Side B
1 belligerent
Colonel George Twisleton.