The Frontier
The Frontier is a massive defensive structure built by the Star League to defend themselves from attack by the Kodan. The entire structure is a defensive wall in similar respects as the famous Great Wall of China.
Specifications
The Frontier is constructed of a massive network of energy barrier generation units that form a massive impenetrable energy wall that prevents any type of attack by the forces of the Kodan Empire. The generator units are positions inside the effect of their barrier rendering them immune from attack by anyone outside the area. The barrier stood for unspecified generations until a Rylon, son of the Star League president, defected to the Kodan taking with him the secret of how to penetrate the energy barrier and cut a hole through it from the outside.