Excellent stuff!
There's another use for a Liegeois force, if you have enough units for a whole army. There was a sort of civil war in Liege in the 1480s, between those who supported their Burgundian-appointed bishop John of Hoorne and the those who followed the notorious William de la Marck, known as the 'Wild Boar of the Ardennes'.
La Marck had somehow been raised to a position of power by the previous bishop Louis de Bourbon (who was both cousin and brother-in-law of Charles the Bold), but had pushed his luck too far (apparently he murdered the bishop's secretary) and was exiled. He returned with an army of mercenaries (mostly raised in France) and had the bishop murdered. He tried to get his own son made bishop in his place, and had to be confronted by Maximilian (who by then was ruling the Burgundian territories). He was defeated, and John of Hoorne was appointed bishop. However a couple of years later la Marck was arrested and summarily executed, and his brothers carried on the civil war for several more years.
Details are scarce, but certainly has potential? On one side the Burgundian-backed Liegeois, on the other the rebels, brigands and mercenaries of the La Marck family.