This directly depends on the Tactician's skill, the more it is, the more likely it is to leave people to hold the enemy, and also the more skill the fewer people are needed. But if the skill level is very low, then it will not be possible to escape from the armies of 500+ warriors in this way.

But there is a way out: you can get out of the battle if about 20 fighters are lost on both sides in total, for this, join the battle and try to kill a few weak warriors and sacrifice a few of your less significant ones, after the required number of deaths, the exit the battle button will appear.

I'm sorry for my English, I hope you'll understand.

I never new that thanks