Conquest of the Liao and Song Dynasties
For a long period of time the Jin people were oppressed by the Khitan people. After winning a decisive victory in the battle of Hubudagang, the Jin carried out its plan to conquer the Liao. In 1120, the Jin Dynasty made an alliance with theNorthern Song(960-1127) to defeat the Liao, and in 1125 the Liao Emperor Tianzuo was captured and his dynasty collapsed. The Jin then assumed total control of Northern China.
Soon afterwards, the Jin turned against the Northern Song. Emperor Taizong (Wanyan Sheng), who was greatly encouraged by the victory over the Liao, launched a general war against the Song. Although the Song army put up a strong resistance, due to its weak court and ineffective leadership, the Jin army prevailed. In 1127, the Jin army took the capital, Kaifeng, and captured the Song emperor. Following the fall of the Northern Song, the remainder of the court fled south and established a new dynasty -- theSouthern Song(1127-1279).
Soon, the newly founded Southern Song also became a target for the Jin. However, this attempt proved less successful for the Jin due to the resistance led by Yuefei, Han Shizhong and other heroes. The Jin army suffered heavy setbacks and could no longer compete with the Song. Thus, a period of coexistence between the two rival powers came into being.
Rule of the Jin Dynasty
1. Administration System
During the "tribal union" period, the premier and union chieftains (bojilie) shared the administration of various Jurchen tribes. This system was abolished following the founding of the Jin Dynasty and a committee was formed that consisted of four, followed by five chief executives who acted as the highest authorities under the emperor. The system was subject to further innovations after a number of Liao and Song territories were conquered during Emperor Taizong's reign. While the Liao and Song administrative procedures were adopted, further reforms were introduced by Emperor Xizong and the Prince of Hailing. When Emperor Shizong came to power, a complete political system was set up. The Shangshu Department, as a primary body, helped the central government conduct state affairs.
2. Military Service System
The Jin military service system involved a combination of various components. Based on the Jurchen system, it showed its own unique character by absorbing elements from the Khitan, Bohai, Yi and Han. As well as laying emphasis on the cavalry, the Jin made efforts to establish and develop other armed forces. The troops consisted of soldiers of many nationalities -- both mercenaries and conscripts and officers enjoyed high status in the country's social strata. This system was to have great influence on the military strategies of later dynasties.
Social Economy
During the early years of the Jin, the frequent hostilities caused the economy to stagnate. In attempt to promote commercial development, Emperor Taizu adopted a policy of reducing trade barriers that included establishing a trading relationship with the Song. Soon, this had an effect on and expedited the recovery and development of commerce. Furthermore, the emperor revitalized agriculture through tax reductions and exemptions to encourage the farming community to trade with the neighboring tribes. From the reign of the Prince of Hailing to the reign of Emperor Zhangzong, the regime enjoyed economic prosperity. The flourishing economy also benefited from a monetary reform that was introduced in 1198 during the reign of Emperor Zhangzong. For the first time ever silver was used as legal tender. This marked was an important milestone in the history of currency and had a far-reaching influence on the currency system of susbsequent dynasties and even modern times.