Analysis of the Formation of the 10 Provinces andthe Dispatch of Local Administrators in the Goryeo Dynasty

The 10-province system was implemented by King Seongjong of Goryeo after the war with the Khitan by organizing its region into 10 provinces. In this thesis, I carefully analyzed the local administrators sent there along with the organization criteria of 10 provinces. The criteria for organizing 10 provinces are as follows.In Gwannae-do and Haeyang-do, the Jeoldosa, of which name was adopted from and used during the Tang Dynasty, was placed along with the Dohobu. These included the regions which was Taejo Wang Geon'’s base and the regions he conquered respectively. In Jungwon-do and Hanam-do, the Jeoldosa, with its own name, was placed. These were the regions within the sphere of influence of Goryeo and Later Baekje. In Gangnam-do and Yeongnam-do, the Jeoldosa, of which name was adopted from and used during the Later Tang Dynasty, was placed along. These were the regions within the sphere of influence of Later Baekje and Silla. In Yeongdong-do and Sannam-do, the Jeoldosa using its own name was placed with the Dohobu, respectively. These were the sphere of influence that belonged to Silla. Also, when the placement of the regions is combined, it unintentionally becomes the same as the placement of the Haeyang-do. Only the Dohobu was placed in Sakbang-do and Paeseo-do.This placement can be said to be an example of how the 10-province system inherited the local system during the Unified Silla period but did not follow the region consciousness of the Later Three Kingdoms period. In other words, the 10-province system had a consciousness of Three Hans Unification, and it is believed that it was to integrate the sense of regional separation based on this.Next, I analyzed the placement criteria of local administrators installed in 10 provinces and their operation methods. First, in the case of the placement criteria, when the cases of their usage are analyzed, it is confirmed that these were used differently even though it was an official of the same name. This was based on the characteristics of the regions where the local administrators were dispatched. Second, in the case of the operation method, the Gwanchalsa is identified in the name of the local administrators, so the local administrators system of the 10 provinces seems to reflect the one of the Tang Dynasty after the An Lushan Rebellion. For example, according to the history of 『Goryeosa』 in the Allyeomsa, the Jeoldosa conducted inspection affair. This is the Gwanchalsa’s function. However, since the Jeoldosa served as the Gwanchalsa simultaneously then it is understood that the Jeoldosa operated it.Finally, I analyzed the abolition of the local administrators dispatched to the 10 provinces. Basically, it is recorded that the local administrators were abolished in March 1005. However, as a result of the analysis, it was found that there were cases of abolishment in 1012 due to the necessity of military defense. What should be noted here is that the local administrators of 10 provinces were completely abolished at once. In fact, it is difficult to see a case of the abolishment of the dispatched local administrators at once. However, such an abolishment was possible, probably because it gave the character of ‘Sajigchagyeon(使職差遣)’ when dispatching the local administrators. This is a method of temporarily dispatching the officials to handle a given task and then abolishing it as soon as the task is completed.Therefore, the local administrators dispatched to the 10 provinces were given the task of militarily defense of the region, and it seems that the local administrators were abolished from the region where the need for such affair decreased in the future. For example, King Hyeonjong whose royal authority was weakened after the second invasion of the Khitan, was able to abolish the Jeoldosa at once, the reason could also be explained if these were officials dispatched as Sajigchagyeon(使職差遣).