How did they subdue the Welsh?
1. The Norman invasions of Wales were directed from Hereford, Shrewsbury, and Chester with the aim of establishing great lordships along the border to hold back attacks from the Welsh.
2. The new Earls soon began seizing Welsh territory for themselves. Rager of Montgomery, Earl of Shrewsbury, took land in mid-Wales where he established the castle and town of Montgomery while his supporters conquered further up the Severn Valley, building castles of their own.
3. In the North, Hugh d'Avranches, Earl of Chester, grabbed territory and terrorised the Welsh by building castles along the River Conwy and raiding into Snowdonia.
4. William FitzOsbern, Earl of Hereford, was responsible for South Wales. He established towns and castles beyond the River Wye but also came to an agreement with the local Welsh rulers by recognising them, in return for their acceptance of his lordship. When William FitzOsbern died in February 1071, his son, Roger of Breteuil, became Earl of Hereford. He continued his father's policy by allying himself with Caradog ap Gruffydd and helping him to defeat the neighbouring Welsh king which established Caradog as ruler in the south