Anytime you like Dan, but right now I think Josh wants his thread back.
In the 3rd edition rules, perforimng the M2 morale check after an assault.
You perform M2 morale checks for a side only if it is the result against that side on the Assault Chart or if that side suffer a loss ("1", "2" or "3") during the assault.
I apologize if this was already understood and implied from your post.