This is an interesting one.
Watchtower scenario - 20 strong infantry core unit can go in the watchtower.
20 core empire men go in. So the detatchments have to go within 3inch.
Gets better. Unit in tower is steadfast, so then the detatchments are stubborn.
Gets better, units can then conga line into opponant's deployment zone.
Very gamey. I strongley disagree but yet cannot find the flaw to stop them doing this.