The war reached its climax during the reign of Offa of Mercia, who is remembered for the construction of a 150 mile long dyke which formed the Wales/England border.
The war reached its climax during the reign of Offa of Mercia. The reign of Offa of Mercia is remembered for the construction of a 150 mile long dyke. This 150 mile long dyke formed the Wales/England border.