Yuuzhan Vong's secession war

A war took place in 20 BBY between the Yuuzhan Vong's alliance and the Nom Anor's grand forces. Nom Anor, military executor reunited his forces and attacked the high command of his nation. With the help of the Galactic Empire, Anor triumphed over his enemies and disolved the nation. This warfare was an explanaition for the division of the Vong to the galaxy, prior to the Yuuzhan Vong War.