My inexperience versus the Tau, smoke and ash reducing my range by 6" and practically none for the Tau, and really crummy dice led to a tactical withdrawal of the Ultramarines. Win goes to the Tau.
The nightfighting rules definitely helped me out a ton. That and I'm not sure I've seen that many BS4 misses.
I've been away from the forums for a bit so excuse me if you already knew this but eaglesmvp has dropped out of the campaign.