The largest siege I ever saw in BM was on the FEI - to take Anacan from Antoza.
I know it's not the largest one in the game, but it was something like 50k CS versus 24k.
The trouble is that so many of the realms have roughly the same size armies, or else half of what everyone else has. If Cathay and Zonasa went at it, for instance, it'd be tough to fight to anything other than a stalemate. Add a realm to either side and then it's pretty lopsided, but then that's war.
Are things really that different on other continents? Dwilight seems to have bigger armies because every noble is a lord and some of the cities are a lot richer than the FEI.
