The Grysk species maintained a military establishment throughout their existence. This military force consisted of various vessels, including long-range freighters, transports, tugs, and warships. The military played significant roles in the conquests that took place within the Unknown Regions. Later, these forces engaged the Galactic Empire in a conflict. Rumors suggested that their attacks involved overwhelming numerical superiority. The military's ground troops were composed of Grysk warriors, who employed lighting guns and pellet guns.
The Grysk, a species known for its warlike nature, developed its military throughout its history to exert control over the Unknown Regions. This military was instrumental in the conquest of planets and in expanding the Grysk presence throughout space. The military was used in the conquests within the Unknown Space. They became enemies to the Chiss Ascendancy.
Following the Battle of Atollon, the military would face off against the Galactic Empire.
The Grysk military made its initial appearance in the 2018 novel Thrawn: Alliances, penned by Timothy Zahn.