Quote Originally Posted by General Appo
As far as I´ve been able to tell, you can´t get MotH´s from city battles, neither offensive nor defensive.
AFAIK you cannot get MotH from defending a city since there is no continuity in the name of the captain name from turn to turn. In RTW I've fought a battle with my army led by a captain, got MotH, and then moved him into a city while I made the decision, only to be told that he died before the messenged arrived telling him he was being adopted. Seems likely that M2TW works the same.

Not sure why attacking a city wouldn't allow you MotH though..