Criccieth Castle a distant relation of Llywelyn ap Gruffudd, began an uprising against English rule that spread quickly through Wales. Several English-held towns were razed and Criccieth (along with Harlech Castle and Aberystwyth Castle) were besieged that winter. Its residents survived until spring when the castle was resupplied. In the 14th century the castle had a notable Welsh constable called Hywel ap Gruffydd, known as Howell the Axe, who fought for Edward III at the Battle of Poitiers in 1356. The castle was used as a prison until 1404 when Welsh forces captured the castle during the rebellion of Owain Glyndŵr. The
Owain Lawgoch identity and raised up new Welsh military leaders such as Owain claiming descent from the ancient Princes of Wales. In May 1372 in Paris, Owain announced that he intended to claim the throne of Wales. He set sail from Harfleur with money borrowed from Charles V. Owain first attacked the island of Guernsey, and was still there when a message arrived from Charles ordering him to abandon the expedition in order to go to Castile to seek ships to attack La Rochelle. Owain defeated an English and Gascon force at Soubise later that year, capturing Sir Thomas Percy and Jean