Baekje relationship with Mahan at first, when it came the founding of Baekje forces to Mahan local, settled on the han-river, such as being the country of feudal lords. The Baekje to king of MaHan the servant relationships, while Baekje went to expand the area to compete with the small countries around. Baekje’s King On-jo in 13 years(B.C.6) asked permission to move the capital city to the king Mahan and finally Wungchon(熊川) boundary delimitation and Territory finally reached. In a record Samkuksaki, King On-jo in 26 years(A.D.8) was attacked by merging to MaHan and King On-jo in 27 years(A.D.9) finally should perish Mahan. However, Record related to Mahan appear Samkuksaki, later interpreted as to the single record onjowang intentionally believe that In Academia ancient history. Thing in Central is disrupt the mokjiguk that, Mahan was destroyed and go south to around the mid-third century. In this way a theory is generalized, and you cannot recognize well a situation at that time that you were combined to Paekche, and the King On-jo rule times, no, the times were ruined after him. The record of Samguksagi is not recognized as due to this phenomenon through founding of Baekje Mahan of the society, thereby not fully understand the situation of the early Baekje was not able to identify correctly. Mahan forces at the time assumed that in the Geum River Basin, the southern boundary of the territory, which come Ung-cheon seems to be this now in the Geum River. Therefore of Mahan merge for onjowang Baekje territory until Geum River valley, across the Han River valley has been extended. Therefore, the fact that conquer Baekje through a series of processes Mahan, the merge onjowang for Mahan's perspective on the entity that can vary, even though it seems to be to be recognized as.