A great game, I played it a few times many years ago, the games club in Rennes (Brittany) had one.
The idea of players having not a definite army, but a changing set of nobles and forces etc who changed sides occasionaly, was a big surprise in these times (I mean, the time when we discovered this game, not the medieval times) 
http://www.argad-bzh.fr/argad/en.html
https://www.anargader.net/
