552년 백제의 한강유역 포기[棄]와 신라,고구려의 밀약설(密約說) = Baekje`s Resignation of the Hangang Basin and the Secret Treaty between Silla and Goguryeo in 552

다국어 초록 (Multilingual Abstract)

From the beginning of King Seong`s reign, Baekje suffered from Goguryeo`s military attacks, and after being defeated by Goguryeo in the Battle of 529, Baekje moved its capital. King Seong had two important missions: he had to defend Baekje from Goguryeo on the one hand, and he had to keep Kaya from breaking away on the other. In order to overcome the crisis, King Seong carried out a dual foreign policy. Clearly indentifying the mutual enemy, he formed an alliance with Silla or Kaya and with Japan. This was to fortify its power through war as well as to prevent the severance of the alliance. From the year 523 to 538, Baekje kept two war fronts. On the northern front, Baekje was struggling with Goguryeo`s attacks, and on the southern front, it was in conflict with Kaya over the occupation of the Sum-Jin Basin. Baekje conducted a non-violent campaign in the Anla region; however, after Geum-Gwan Kaya surrendered to Silla, it fell into a difficult situation. After the year of 541, Baekje implemented an aggressive foreign policy in the Kaya region. As a result, Baekje was able to put Dae Kaya under its control. Also, after the annexation with Silla, Baekje launched aggressive military assaults against Goguryeo. Baekje was able to do this by taking advantage of Goguryeo`s state of internal affairs at that time. However, it would have been impossible if it were not for the help of Silla. Silla, recognizing the importance of its role, demanded compensation for its military assistance, and Baekje ceded Silla a large portion of territory that it had gained between 550 and 551. In the mean time, King Seong constantly claimed that Baekje was being attacked by the allies of Goguryeo and Silla, with the intent to draw Kaya and Japan into its forces. Through this strategy, Backje, until 551, was able to form an alliance that included Silla during the battles with Goguryeo, and to mobilize troops from Kaya and Japan during the battles with Silla. Hence, it is problematic to view Baekje`s resignation of Hansung and Pyongyang nd the marrying of its princess to the King of Silla as an act of retreat, simply a esult of Silla and Goguryeo`s secret treaty. Although the treaty was for the mutual nterests of Silla and Goguryeo, as evidenced in the erection of the Hwangchoryong nd Maunryong steles(568), it is problematic to view Silla`s occupation of the Han asin and its northeastern territorial expansion after the Gwansansung Battle simply as a esult of the secret treaty with Goguryeo. To conclude, the Gwansansung Battle was ntended to be a turning point for Baekje. It was a battle in which Baekje planned to ttack Goguryeo with the help of Silla, to take Kaya under control, and then, to attack illa.

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