Battle of Moel-y-don

The war began when Dafydd turned against the English and slaughtered the garrison of Hawarden Castle.

One important expedition, consisting of 2000 infantrymen and 200 cavalrymen under the former constable of Gascony, Luke de Tany, was sent to capture the island of Anglesey.

He had contacted some of the clergy in Bangor, who had promised to aid him by giving a signal when the time was right to attack.

According to historical accounts, Llywelyn had scouts and lookouts monitoring the movements of the English forces.

They went into the sea but, heavily laden with arms, they were instantly drowned.Luke de Tany, the nobles Roger de Clifford, Phillip and William Burnell (brothers of the chancellor Robert Burnell), sixteen English knights (and their esquires) and over 400 of Tany's men perished.