Raiding a besieged city?
I would like to raid a city my coalition is in a challenge with, but when I spied him (hours away), he was besieged by a much higher level archon than both of us, with thousands of troops there. If I try to raid the besieged city, will I have to fight through the besiegers (against whom I'd have no chance), or just against the city defenses of the city I'm trying to raid?
Any explanation or advice would be appreciated!