gh3tt0 gangst3r 说:
put them in the prison in the towns
Thx! That gave me a fair chance to wipe out a faction. Though it was a lot, lot, lot of battles with not the best odds... When I captured the 13th enemy warlords (considering the occasional fleeing of another one I must have captured more than 15, which means probably ~50 battles. Wow.) Finally the accompanying party of the Khan became notably smaller. Before the only (not unimportant) difference was that more towns and forts had no noble lord inside the gates (as they were running around) which made taking towns/forts easier.
Long story short: That advise is awesome!