It was heavily fortified by the Star Army of Yamatai. In YE 40 a series of attacks were undertaken in system-contained assaults such as Battle of Hanako's Star which required a multi-fleet operation by the Star Army to secure their success. Despite this, the defenses of the but in late YE 41 it was almost wholly taken by the Kuvexians and by YE 42 the Ketsurui military sector was all territory of the Kuvexian Empire.
See also: UX Series Star Systems
The Defense Networks consist of Zodiac-class Star Fortresses (each equipped with very long range sensors and weapons), hundreds of Kante-class stations, and hundreds of thousands of PANTHEON'S EYE sensor drones. Other, less common equipment is also mixed in, such as various special sensors, superweapons, and hulked starship hulls converted into stationary or short-range mobile automatic gun platforms.