An interesting suggestion

[Amok]

The AI might not be shown in the next battle you fight, or not in any battle at all, but it might be possible, or they just won't be recognizable because they could have been retrained to have better weapons or armor, and their number might grow again so they are the full force.

But that 2-4 raiding party can quickly be taken down by some larger force, unless some freak accident happens when you click auto-resolve and it ends as a tie for some reason. But most people will probably play that small battle since it will be easy, and you can test out new tactics in that battle. But it shouldn't be too much of a problem, unless you want a full force to take down a big force that is coming your way.

But I just read here: http://forums.totalwar.com/showthrea...ad-(unofficial)
that there are hostage units that can be traded for your hostage units or something else, and there is fog that blocks a unit's vision so they can't suspect an attack which satisfies somewhat but hopefully you can have artillery shoot smoke, like how in Rome you could have Ballistas shoot fire arrows with the special ability option. So I guess posted an idea that was already progress, maybe.