More good points all around; I've only seen the show once, so I'm very fuzzy on details like that, thus my asking for opinions on everything under the sun. People seem to live a rather long time in Avatar, Bumi and Kyoshi being examples. I think it's reasonable that it could have happened that long ago, even if in truth it didn't. The reuniting is because Azula actually ordered it. Easier to keep an eye on them if they're all in one place. Before that, they were just farther north than normal.