The Jurchens flourished in the present-day Heilongjiang River, Songhua River basin and Changbai Mountain area, and the capital was Acheng. On January 28, 1115, the Jurchen leader Wanyan Agu was proclaimed emperor and founded the country, with the name Dajin. After the founding of the Jin Dynasty, the war to destroy Liao was launched with Liao Wujing as the strategic goal. After the five capitals, the Liao Dynasty immediately perished. After Jin destroyed Liao, he became an enemy country with the Northern Song Dynasty. After Jin Taizong completed Yan Sheng's accession to the throne, he destroyed the power of Liao, and soon swept south, and destroyed the Northern Song Dynasty in the fifth year of Tianhui (1127 AD). After eliminating the Liao Dynasty and the Northern Song Dynasty, the Jurchens unified the vast northern regions, including the Yellow River Valley, and confronted the Southern Song Dynasty for a long time. While the Jin dynasty implemented unique systems such as Meng'an Moke, it also adopted many political systems in the interior. During the reign of Wan Yan Liang, he launched a large-scale war against the Southern Song Dynasty, but it ended in failure. During the period of Jin standing side by side with the Southern Song Dynasty and the Western Xia, he forced the Western Xia to submit to the Southern Song Dynasty and sued for peace in humiliation, always maintaining its hegemony. In the later period of the Jin Dynasty, the ruling group was extremely corrupt, and various ethnic uprisings were surging, and at the same time, they were constantly attacked by the army of the Mongolia Empire (Yuan Empire), and finally the country was destroyed.
