Domain Steng was considered a primordial Domain within the ranks of the Yuuzhan Vong. During the time of the Cremlevian War, Steng, the initial Warmaster, commanded this Domain. The Domain was one of the strongest among the Yuuzhan Vong. They fought Domain Yo'gand for supremacy over the Yuuzhan Vong galaxy. Ultimately, the Domain was forced to retreat to Ygziir, where they established defenses. Yo'gand, who headed the opposing Domain, ultimately annihilated Ygziir by causing its moon to collide with the planet, an event thereafter referred to as Yo'gand's Core. Domain Steng either capitulated or was completely eradicated.