I just downloaded Empire Total War (Steam). I'm a longtime total war player but as someone used to the melee only combat of earlier games, I find the battles a bit overwhelming at first. In previous Total War games, you had the option of putting some, or even all of your troops under AI assistance. But in my brief foray into Vanilla Empire custom battles...I couldn't find any indicator that let me have that option. Is there a way to put some of your army under AI control so you can focus on another part of your army? Beyond that, is there any way to have battles, custom or whatever, where it's just the AI facing the AI?

Thank you for any info.