Llangefni Anglesey United Kingdom

…invades Anglesey.

Cadwallon, King of Gwynedd from 624, is defeated in battle and is besieged on Puffin Island.

More serious for the Welsh rebellion, English forces land in Anglesey from Ireland.

They will gradually push the Welsh back over the next year until the resistance in Anglesey formally ends toward the end of 1406.

The young Henry of Monmouth, rRather than focusing on punitive expeditions favored by King Henry IV, adopts a strategy of economic blockade.

Using the castles that remain in English control he gradually begins to retake Wales while cutting off trade and the supply of weapons.