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|title= Kingmakers: How Power in England Was Won and Lost on the Welsh Frontier

|author=Timothy Venning

|date=January 2017

|isbn=978-1445659404

}}

Between the Norman conquest and the Tudor period, Britain often seemed to be on the verge of civil war. The Anglo-Welsh borders were a perpetual source of trouble, kept at bay only by the Marcher lords appointed by the King of England to guard the Welsh Marches.