The Penumbra Squadron was a fighter squadron in the 82nd Airborne Division of the Templars of Twilight Marine Corps. The Penumbra Squadron were an elite fighter force, akin to the New Republic's Rogue Squadron though specializing in atmospheric combat. When they were originally founded in 10 BBY they used various starfighters purchased from external sources. Following 8 ABY they, along with majority of the other starfighter squadrons in the Military adopted the Aeternus-class Heavy Interceptor.