Theodore I Laskaris vs Wanyan Aguda

After the Fourth Crusade captured Constantinople, Theodore I Laskaris fled to Nicaea in Asia Minor and established a Byzantine government-in-exile. He organized resistance against the Latin Empire and the Seljuk Turks, laying the foundation for the Nicaean Empire as the primary successor state of Byzantium.

Theodore I Laskaris was formally crowned as emperor by the newly elected Patriarch of Constantinople-in-exile, Michael IV Autoreianos. This coronation legitimized the Nicaean Empire as the rightful continuation of the Byzantine Empire, with full ecclesiastical authority.

Theodore I Laskaris defeated the Seljuk Sultanate of Rum at the Battle of Antioch on the Meander. The victory secured Nicaean control over western Anatolia and prevented Seljuk expansion into Byzantine territories, establishing Theodore as a major regional power.

Theodore I Laskaris led Nicaean forces to a victory over the Latin Empire at the Battle of Rhyndacus. The battle halted Latin expansion into Asia Minor and secured Nicaean control over the region, strengthening the Byzantine resistance against the crusader states.

Aguda's Jurchen forces defeated a Liao army at Hubudagang, marking the first major victory of the rebellion. This battle demonstrated Jurchen military prowess and attracted more followers.

Wanyan Aguda united the Jurchen tribes under his leadership, creating a confederation that rebelled against Liao domination. He organized a disciplined army and began the Jurchen revolt.

Wanyan Aguda proclaimed himself emperor, founding the Jin dynasty. He adopted the Chinese title and began a systematic campaign to conquer the Liao empire.

Aguda's forces captured the Liao supreme capital Shangjing, dealing a severe blow to the Liao dynasty. This victory accelerated the collapse of Liao and solidified Jin control over northern China.

Aguda formed an alliance with the Northern Song dynasty to jointly attack the Liao empire. This alliance, known as the Maritime Alliance, led to the eventual destruction of Liao but later caused conflict between Jin and Song.

Wanyan Aguda died, and his brother Wanyan Wuqimai succeeded him. Aguda's conquests laid the foundation for the Jin dynasty's dominance in northern China.