Stygium missiles

Stygium missiles were explosive missiles that used stygium crystals to cloak themselves mid-flight and were usually used in anti-air defenses, as they could not be detected by pilots and were usually equipped with technology that blocked radars and other sensors.

History
Stygium missiles were first experimented with during the Clone Wars by Separatist researchers on Raxus Secundus. These missiles saw limited use during the war, and were distributed to only a handful of Separatist militias along the battlefronts. Following the war, Imperial researchers developed their own stygium missiles, which saw just as little use as their Separatist predecessors, though many captured stygium missiles were later used against Imperial starfighters by the Rebel Alliance. During the New Republic era, Aeten II, the primary source of stygium in the galaxy, fell under the control of an Imperial warlord, who fortified his holdings with several stormtrooper regiments. Two New Republic Army battalions, supplemented by a number of SpecForce and marine units, were deployed on Aeten II to secure the world and its stygium mines. After they succeeded in their objective, large amounts of stygium were taken to New Republic research stations across the galaxy and were used in the production of stygium missiles and starfighter cloaking technology.