Hayastan Campaign CTD

Just had my first CTD, figured I'd come here to figure out the issue.
Turn 2 Hayasdan campaign, I've defeated an army in the field in Pokr Hayk, and when I go to assault the "city" of Ani-Kamah, the game crashes about 20 or so minutes into the battle. The log file represents the crash after my 2nd attempt at this assault.

EDIT: I've now allowed 2 turns to pass and let the enemy sally forth, the same CTD occurs.