Justin Pickard said:The best way I can imagine for this to happen is with no Blijde Inkomst, so that - upon the death of John III, Duke of Brabant with no male heirs - the Duchy of Brabant decends into anarchy, with several factions vying for control. The French threaten an invasion in an attempt to encircle Flemish Zeeland. Then we could have a Liege-Brabant mutual defense union thingummy, which eventually becomes political and permanent...? Anyone got any better ideas
Looks good. Historically lots of rivalries between Liège and Brabant to control route towards Cologne. Since Worringen, Brabant controlled Limburg (which is not OTL Limburg province, but actually Eastern part of OTL Liège province), which meant Liège was squeezed. OTOH, Liège grasped the County of Looz, which is OTL Limburg. I can perfectly see one of the more bellicose Prince-Bishops (e.g., de la Marck) seizing the opportunity of unrest in Brabant to extend his domain there. He might gobble up the small County of Namur - a traditional ally of Flanders - along the way, and so fully control the Meuse valley from Dinant to Maestricht.
I can definitely see Liege as having strong ties to the HRE, perhaps even as a member state. Having siezed the French throne in 1332, the Dukes of Burgundy will be driven back by Charles II of Navarre in the early 1360s of TTL. Charles will probably annex a fair chunk of Burgundy to the French nation following his sucesses in 1362. So, yes - some form of limited oligarchic democracy does look quite likely...interesting...
Liège was a member of the HRE, just as Brabant, Namur or Hainault. The border between the HRE and France was the Scheldt until the Ladies' Peace in the 1520's. All the cities had pretty liberal constitutions, and were essentially self-governed. IIRC, for matters that were of interest to the entire principality, there was a council with representatives of the 7 main cities (Liège, Dinant, Huy, Maestricht, Tongeren, etc.) that "assisted " the Prince-Bishop.