The purpose of this research is to investigate the political trends of around Koguryo’s downfall in Chaekseong area(柵城 圈域). The Tomb epitaph of a Koguryo refugee Yi Ta-in(李他仁) and Tang(唐) government official Yang Hyun-ki(陽玄基) used for this study. Yi Ta-in of the highest local governor in Chaekseong area surrendered to Tang troops in February 668. He was appointed a local governor of Dodokbu(都督府) which was installed in Chaekseong area after Koguryo downfall. Tang claimed Gimi(羈縻) ruling which acknowledge local influential person of Koguryo. But Yi Ta-in had stayed in capital of Tang. So Tang strongly had ruled Chaekseong area. This was the cause of the Koguryo Revival Movement. Ko Jung-mun(高定問) had taken up arms against Tang between December 668 and April 669. He commanded the local military forces as local governor of Chaekseong area before fall of Koguryo. This was a base for the revival movement. Also, his last name Ko(高) had an effect on revival movement. Because of this, Ko Jung-mun became the center of the revival movement. Ko Jung-mun’s troops was suppressed by Tang forces stationed in Chaekseong area and he was killed. At this time, jangsa(長史) Yang Hyun-ki(陽玄基) of Dong-Chaekju-Dodokbu(東柵州都督府) took the leading role. This shows that Tang"s dominance in Chaekseong area worked strongly.
The purpose of this research is to investigate the political trends of around Koguryo’s downfall in Chaekseong area(柵城 圈域). The Tomb epitaph of a Koguryo refugee Yi Ta-in(李他仁) and Tang(唐) government official Yang Hyun-ki(陽玄基) used for this study. Yi Ta-in of the highest local governor in Chaekseong area surrendered to Tang troops in February 668. He was appointed a local governor of Dodokbu(都督府) which was installed in Chaekseong area after Koguryo downfall. Tang claimed Gimi(羈縻) ruling which acknowledge local influential person of Koguryo. But Yi Ta-in had stayed in capital of Tang. So Tang strongly had ruled Chaekseong area. This was the cause of the Koguryo Revival Movement. Ko Jung-mun(高定問) had taken up arms against Tang between December 668 and April 669. He commanded the local military forces as local governor of Chaekseong area before fall of Koguryo. This was a base for the revival movement. Also, his last name Ko(高) had an effect on revival movement. Because of this, Ko Jung-mun became the center of the revival movement. Ko Jung-mun’s troops was suppressed by Tang forces stationed in Chaekseong area and he was killed. At this time, jangsa(長史) Yang Hyun-ki(陽玄基) of Dong-Chaekju-Dodokbu(東柵州都督府) took the leading role. This shows that Tang"s dominance in Chaekseong area worked strongly.
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