Although English monarchs had made several attempts to seize control of the native Welsh territories, it was not until Edward's war of conquest against Llywelyn ap Gruffudd ("Llywelyn the Last") of 1277 to 1283 that this was achieved on a lasting basis.
Selvom de engelske monarker havde gjort flere forsøg på at få kontrol over de walisiske områder, var det ikke før Edvards krig mod Llywelyn ap Gruffudd ("Llywelyn the Last") fra 1277 til 1283, at det lykkedes dem at få fast fodfæste i Wales.