Halbegardia was a nation-state situated on the world of Adumar. Its geographical location placed it in proximity to Cartann.
Following the unilateral establishment of a global government by the perator of Cartann, Halbegardia, in conjunction with the Yedagon Confederacy, opted not to recognize Cartann's authority. Subsequently, the perator announced that they were no longer under Cartann's protection and were now subject to pacification measures.
During the Adumari Civil War, it became a member of the alliance opposing Cartann. Cheriss ke Hanadi commanded the Elite Halbegardian forces that successfully invaded the perator's palace, resulting in the capture of the perator, his cabinet, and his staff. Eventually, Halbegardia became part of the Adumari Union.