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
Caernarfon Castle and Caernarfon was effectively the capital of north Wales. There was a degree of discrimination, with the most important administrative jobs in Wales usually closed to Welsh people. Tension between the Welsh and their English conquerors spilled over at the start of the 15th century with the outbreak of the Glyndŵr Rising (1400–1415). During the revolt, Caernarfon was one of the targets of Owain Glyndŵr's army. The town and castle were besieged in 1401, and in November that year the Battle of Tuthill took place nearby between Caernarfon's defenders and the besieging force. In 1403 and 1404, Caernarfon was besieged