Emperor Taizu of Jin

Wanyan Aguda led the Jurchen tribes in a rebellion against the Khitan-led Liao dynasty. He unified the Jurchen clans under his leadership, establishing a confederation that would form the basis of the Jin dynasty.

Aguda's Jin forces defeated a Liao army at the Hubu River. This victory secured Jin control over the Liao's eastern territories and demonstrated the military effectiveness of the Jurchen cavalry against the Khitan.

Wanyan Aguda declared himself emperor, founding the Jin dynasty. He adopted the Chinese-style reign name Shouguo and established a centralized administration, marking the formal beginning of the Jin state.

Jin forces under Aguda captured the Liao dynasty's Supreme Capital (Shangjing). This conquest crippled the Liao state and forced the Liao emperor Tianzuo to flee, effectively ending Liao resistance in the region.

Aguda negotiated the Alliance of the Sea with the Song dynasty, agreeing to jointly attack the Liao dynasty. The Song would receive the Sixteen Prefectures, while Jin would take the rest of Liao territory.