The Twin Ion Engine Starfighter revolutionized fighter design and fundamentally reshaped Imperial military doctrine. Based around Raith Sienar's radical Clone Wars-era SIE-TIE twin ion engine concept, these ships were faster and more maneuverable than anything seen before, and the Empire eagerly began planning to have them replace their aging starfighter force. Though small and cheap, the first full production models lacked the power required to provide adequate shielding, hyperdrive, and life support systems.
The Incom T-65 X-wing fighter is the Alliance's primary space superiority platform. Originally planned for the Imperial starfleet as a replacement for the venerable Z-95 Headhunter, this fighter was delivered to the Rebellion near the start of the Galactic Civil War when the entire design team defected, bringing the prototype fighters along with them.
The first dedicated space superiority craft developed for the New Republic military, FreiTek's E-wing is a balanced and powerful fighter. Introduced several years after the Battle of Endor, the E-wing experienced more than its share of teething problems, as the initial design was built around the R7 astromech droid, an advanced custom-built unit which brought a host of its own glitches along with it. As a result, many squadrons were hesitant to adopt, and the E-wing never completely replaced Incom's often-upgraded T-65 X-wing in the New Republic fleet.