Unit control in battles

[Thefallenhun]

I was watching some elephants go berserk, when I had a thought. Would it be possible to make a unit that actually BETRAYED you in battle, and went over to the nemies side. I know that there are scripts that change who controls the unit, e.g. your control to uncontrollable when broken, and under ai control to your control in terms of reinforcements. So might it b possible to have a unit go to the enemy ai?

[Ishan]

So might it b possible to have a unit go to the enemy ai?

No.
Closet thing i have seen is the hero power in crusades campaign for the Byzantium king.

Byzantine Politics: Causes infighting amongst an enemy unit, essentially removing them from play until order is restored or they are attacked. It can only be used once per battle