 Llywelyn's allies in south Wales were given back lands taken from them by the Marshalls and Llywelyn himself gave up his conquests in Shropshire.In 1228, Llywelyn was engaged in a campaign against Hubert de Burgh, who was Justiciar of England and Ireland and one of the most powerful men in the kingdom.Hubert had been given the lordship and castle of Montgomery by the king and was encroaching on Llywelyn's lands nearby.