What happens to a officer that has enemy units enter its hex?

By player781234, in Battles of Napoleon

What happens to a officer that has enemy units enter its hex when it is alone?

RAF1945 said:

What happens to a officer that has enemy units enter its hex when it is alone?

The commander has to retreat one hex immediately, in a Hex which is not adjacent to an ennemy unit. If he cannot proceed like this, he is eliminated.