His marches in the eastern campaign of 1643 show a daily average at one time of 28 m.
It is mentioned so early as the 7th century and in 868 Baldwin of the Iron Arm, first count of Flanders, who had been entrusted by Charles the Bald with the defence of the northern marches, built a castle here against the Normans raiding up the Scheldt.
Vast and impenetrable forests, impassable marches and thickets, numerous lakes, swampy meadows, with cleared and dry spaces here and there occupied by villages, are the leading features of this region.
(Lefebvre), all new formations since the outbreak of the war, followed some marches in the rear.
The lordship remained in the marches till the Act of Union 1536, when it was grouped with a number of others so as to form the shire of Brecknock.