[quote=@Abefroeman]
Also, for how long have the Iron Islands been a sovereign kingdom? Was this granted to them by a predecessor of Aegon X, or, did they declare their freedom, so to speak, and no one has bothered to bring them to heel yet?
[/quote]

The latter. We used the chaos of Danaerys' crossing to Westeros to declare freedom and no one has really challenged it. 

Also, I've given Torrhen's Square a lot of thought and I have realised something. If Jakkon sailed 40 ships up there and found a considerable naval force docked their... well, these are Ironborn raiders. They would just steal as manq ships as possible, torch the rest and run the fuck away. I can't see any reason why they'd do anything else. I also don't recall signing Jakkon up for capture...