In the ancient class system, the ruled class can be divided into peasants, subordinates and slaves. Subordinates were a class between peasants and slaves. Haho(下戶) in the age of Samhan(三韓) and Bugok in the age of the Three Kingdoms are corresponding to this class. In Buyeo(夫餘) Homin(豪民) kept Haho as subordinates, and in Samhan Jusu(主帥) at Kukeup(國邑) took residents at Byeoleup(別邑) as their subordinates. In addition, subordinates were generated in the course that a major country conquered and annexed surrounding minor countries. In Samgukji(三國志) is written, Groups of prisoners or slaves lived together at places remote from Daebanggun, which shows that Haho was a low-class people. Until now, the academic circle in North Korea regarded Samhan as a society of slavery and identified Haho as slaves. The academic circle in South Korea, however, understood Haho and Bugok as common-class peoples and assumed that Bugok originated from the Unified Shilla Dynasty. The myth of foundation of the Shilla Dynasty also shows the existence of subordinates. Saro Yukbu (漸盧六部) was an alliance of six tribes, which were powerful local families in the Gyeongju(慶州) area. The founder, King Park Hyeokgeose created the myth of foundation to undermine the power of the six tribes. The third king Yuri bestowed surnames to the chiefs of the six villages but he could not control them. Thus, the government executed Gunhyeon-je(都縣制) to contain local powers, but organized Bugok where the local families' influence was potent and allowed governing authority to the village chiefs. On the other hand, the establishment of Gunhyeon-je in Shilla is related to the origination of Bugok. Some scholars maintained that Bugok residents were common people, citing as its theoretical ground, When Shilla planned provinces and counties, if the population of an area was too small to be Hyeon(懸), Hyang(鄕) or Bugok was organized and it was put under the control of the village, to which it belonged as written in Sinjeungdonggukyeojiseungram (新增東國與地勝聲). However, the subordinate relationship between Gunhyeon and Bugok can be traced back to the relationship among small countries in the age of Samhan.