Usually when party encounter Lieutenant in path, overlord will draw an encounter card and proceed if the party is ambush or not, but what happen if the party encounter Lieutenant in one of the town? Do the Overlord draw a random encounter card or Dungeon card?
On my session, I just put a 8 by 8 grid board and place random people tiles and market tiles so it would seem the party is battling the Lieutenant and his minions in the middle of the market.