Or some sort of rescue-operation: You have to evacuate civilians from an attacked place. First you have to find them, then move a soldier one field next to them. Then you can control them, just like any solider. You may even give them a pistol or something, when you reach them. Don't know, if the engine makes that possible, but from the mechanics, it would be a little like psi-control, just permanently. (Maybe you don't need to finde them totally by yourself, but have their current location pointed on the map?)