Quote Originally Posted by JustSomeGuy View Post
I thought the Iron Islands didn't count, they were just a part of the North - in as much as it seemed up to Ned to keep them in line, obviously with help of the other regions when they rebelled; But then when the north rebelled, all but dorne got in on the act, so i don't see that as reason for anything on it's own.
That appears to be correct, according to the Song of Ice and Fire wiki; although it lists the Iron Islands as having been part of the Riverlands when Aegon arrived, and him splitting the territory into two parts. They seem to have been attached to the North at a later date.