Walkthroughs for custom maps.

I don't understand. What prevents the necessary battles from being held during events?

Events are not visible at all... the player learns about a battle after it has already happened. But if you ask why not take a creature, for example, 1 Imp, and place an event in front of it, my answer will be simple - after the battle with the Imp, all the bonus for morale and luck will be reset, and the battle in the event will become artificially more difficult.