Well Highmarch only recently flipped, and Perleone only recently declared war on Minas Nova.
Some months back, Highmarch, Perleone, Alara, and Minas Nova were with Vix, Fallangard, and Perdan against the rest of the North.
Obsidian Islands is as irrelevant as ever. Technically aligned with the South, they spend their days pathetically taking, and then systematically losing, the worst region in the game.