[PvK]

Er, but you can already do that by throwing small attacks - if it turns out that your attacks get resolved first, then the battle will take place at the enemy location, and the enemy won't move. Numbers are probably what tips the odds, so if you draft a mob of cheap militia or something and have it attack the enemy main force with Fire and Flee or something, and enough commanders to keep gathering the rabble and re-attacking, you have a good chance of delaying or temporarily stopping a superior enemy force.

Seems like the current mechanic allows this tactic, yet doesn't make it automatic, and favors the larger force. Sounds about right.

PvK