Immediately after the
Norman Conquest,
King William of England installed three of his most trusted confidants,
Hugh d'Avranches,
Roger de Montgomerie, and
William FitzOsbern, as
Earls of Chester, Shrewsbury and Hereford respectively, with responsibilities for containing and
subduing the
Welsh. The process took a century and was never permanently effective. The term "March of Wales" was first used in the
Domesday Book of 1086. Over the next four centuries, Norman lords established mostly small
marcher lordships between the Dee and Severn, and further west. Military adventurers went to Wales from
Normandy and elsewhere and after raiding an area of Wales, then fortified it and granted land to some of their supporters. One example was
Bernard de Neufmarché, responsible for conquering and pacifying the Welsh kingdom of
Brycheiniog. The precise dates and means of formation of the lordships varied, as did their size. The March, or
Marchia Wallie, was to a greater or lesser extent independent of both the English monarchy and the
Principality of Wales or
Pura Wallia, which remained based in
Gwynedd in the north west of the country. By about AD 1100 the March covered the areas which would later become
Monmouthshire and much of
Flintshire, Montgomeryshire,
Radnorshire, Brecknockshire,
Glamorgan, Carmarthenshire and
Pembrokeshire. Ultimately, this amounted to about two-thirds of Wales. The lordships were geographically compact and jurisdictionally separate one from another, and their privileges differentiated them from English lordships. Marcher lords ruled their lands by their own law—
sicut regale ("like unto a king") as
Gilbert de Clare, 7th Earl of Gloucester stated — whereas in England fief-holders were directly accountable to the king. The crown's powers in the Marches were normally limited to those periods when the king held a lordship in its own hands, such as when it was forfeited for treason or on the death of the lord without a legitimate heir whereupon the title reverted to the Crown in
escheat. At the top of a culturally diverse, intensely feudalised and local society, the Marcher barons combined the authority of
feudal lord and vassal of the King among their Normans, and of supplanting the traditional
tywysog among their conquered Welsh. However,
Welsh law was sometimes used in the Marches in preference to English law, and there were disputes as to which code should be used to decide a particular case. From this developed the distinctive
March law. ==The end of Marcher powers==