Spring 1404 - Glyndŵr took the castles of Cricieth, Aberystwyth & Harlech.

May 1404 - Glyndŵr and his men attacked Coity Castle.

May 10th, 1404 - Glyndŵr held a conference in Dolgellau where he appointed Gruffudd Yonge as his Chancellor and John Hanmer as his Special Ambassador.

June 1404 - After they had put Coity Castle under siege, Glyndŵr’s men continued their campaign through Glamorgan.

June 1404 - The Battle of Stalling Down, near Cowbridge (according to Iolo Morgannwg).

June 1404 - Glyndŵr attacked castles and towns in the Vale of Glamorgan, including Cardiff Castle.

June 10th, 1404 - The Welsh attacked Archenfield.

June 21st, 1404 - Glyndŵr’s first parliament in Machynlleth.

July 14th, 1404 - Gruffudd Yonge and John Hanmer concluded a formal treaty of alliance with Charles VI in Paris.

August 1404 - Henry Dwn again attacked Kidwelly.

August 20th, 1404 - After a heavy defeat at the Battle of Campstone Hill (near Grosmont), Glyndŵr’s men won the Battle of Craig-y-Dorth (near Monmouth).

September 1404 - Beaumaris Castle was captured by a Welsh force.

November 14th, 1404 - The English failed to break the siege at Coity Castle.