On the other hand, the Sui Dynasty, which was founded in 581, unified mainland China, but their failure to achieve any results even after conducting four large scale expeditions to Kyoguryo during the reign of Yo Ken (Yang Jian) and Yo-dai (Emperor Yang) served as a major cause of its decline and finally its demise when Yo-dai was assassinated in 618.
一方、581年に建国された隋は中国大陸を統一し楊堅・煬帝の治世に4度の大規模な高句麗遠征を行ったもののいずれも失敗し、これが有力な原因となって弱体化、618年に煬帝が殺害されて滅んだ。