The kokuga forces system indicates a historical concept of a national military system established in the period from around the end of ancient times to the early medieval period of Japan (the 10th century to the 12th century).
国衙軍制（こくがぐんせい）とは、日本の古代末期から中世初頭にかけて（10世紀-12世紀）成立した国家軍事制度を指す歴史概念。