The revolt quickly spread through Glamorgan and Gwent; Kenfig castle was sacked, as was the castle at Llantrisant, and several others were attacked, including St Georges-super-Ely, Llangibby and Dinefwr Castle.
He was the leader of the Glamorgan insurgents during the rising of Madog ap Llywelyn in 1294-5; under his leadership, the Welsh captured castles at Kenfig, Llangibby, and Morlais.
His key strongholds were Cardiff Castle, which already may have been built, on the site of an old Roman fort, new castles at Newport, and at Kenfig.