Gwilym ap Tudur Rhys and Owain Glyndŵr. As a result, the Tudur brothers began planning an attack on Conway Castle. On Good Friday, 1 April 1401, the brothers and 44 men (which included those who had also been excluded from the pardons) infiltrated the castle. They had pretended to be carpenters, and captured the castle while the guard were in church. Negotiations began for the return of the castle on 13 April, with the king represented by Henry "Hotspur" Percy and Gwilym representing the Welsh forces. After seeking a compromise, which would have resulted in pardons being given to the Welshmen, the king
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