I don't have the cards in front of me, so please forgive if I name the wrong cards.
I was playing Baratheon and issued a military challenge against a Lannister player. I forget what character it was, but the Lannister player didnt declare defenders. He choose to resolve the claim with a Cerci's (sp?) Attendant. I had a Banner of the Storm in play (as a character). We got into a discussion about timing none of us knew how to resolve.
1) Can you respond to winning a challenge and attach Banner of the Storm to a character, and then use Vigilance from the same win and stand the same character?
2) How do you decide what order to play effects? ( in our case, Vigilance versus Cerci's Attendant)