Crown PrinceGaul Panteer, senator and heir to the throne of Alderaan, chose to secede from the Galactic Republic after the controversial Treaty of Coruscant was signed. Many civilians of Alderaan opposed the decision, and many others supported it. Security forces managed to keep the peace until the prince was assassinated. The queen died in a shuttle crash in the Glarus Valley days later with no heir, leaving Alderaan's throne open for many noble houses to claim it for themselves. Bouris Ulgo claimed the throne for himself, while Houses Thul and Organa challenged him, resulting in civil war.