Battle of Coed Llathen Lacking a guide, the English army decided to march back to Carmarthen. The Welsh armies in the woods hit the English with devastating guerrilla attacks (using mostly bows or javelins) from the first hour of Saturday right up until midday. There was an engagement between the two forces at midday which saw the Welsh troops outflank the English and successfully capture the English supply train at Coed Llathen. Although there seem to have been few casualties, the engagement at Coed Llathen swung the balance in favour of the Welsh since the English had lost most of their provisions. The Battle of Cymerau Following their defeat at Coed Llathen, the English army retreated westward towards Cymerau. The land at Cymerau was ideal for the Welsh since it contained ravines and heavily wooded areas which would allow the Welsh to ambush the English with ease. The land was also wet and marshy, meaning that the English knights would have trouble riding over it. The Welsh ambushed the English with their full army and a bloody battle ensued. Many English were said to have been torn from their mounts and trampled to death by the Welsh army. Stephen Bauzan was killed along with around 1,000–3,000 of his men (the amount killed varies with the source). The remaining Englishmen fled the battle. Llywelyn ap Gruffudd, Prince of Gwynedd, is said to have been present at the battle, collecting spoils from the fallen English army. Aftermath, later conflicts, and the Treaty of Montgomery The victory at Cadfan allowed the Welsh forces to take the castles of Laugharne, Llansteffan, and Narbeth. Rhys Fychan hastily made his peace with Llywelyn, and Llywelyn returned Rhys's lands to him. There was a problem, however: Maredudd ap Rhys and Maredudd ap Owain had now been stripped of their new land. The two therefore switched sides and paid homage to Henry later that year. King Henry (who had originally viewed Llywelyn's rising as only a small rebellion) was shocked. Henry quickly realized the seriousness of the situation and personally organized another attack on Wales during the same year. This attack also proved unsuccessful when supply ships from Ireland failed to reach Henry and Edward's invading army. Lacking food and supplies, the English army was forced to retreat, being constantly harassed by victorious Welsh guerrilla fighters on the way back. Edward launched yet another invasion of Wales in