AI control button: not implemented?

[Slaists]

I am just wondering if battlefield option to put some of your troops under the AI control is not implemented or I just cannot find it... In the previous TW games, at times, I used to put a group of my troop under the AI control while controlling just a couple critical units myself. Is it possible with ETW?

[NimitsTexan]

As far as I can tell, it is absent both in battle and the reinforcement screen.