Gojong of Korea vs Nurhaci

Gojong declared Korea an empire, assuming the title of Emperor. This was an attempt to assert Korea's sovereignty and equal status with China and Japan, and to modernize the state. The move was partly a response to the assassination of his wife, Empress Myeongseong.

Under Japanese pressure, Gojong's government signed the Eulsa Treaty, making Korea a Japanese protectorate. Gojong did not sign the treaty himself and later attempted to appeal to international powers, but the treaty stripped Korea of its diplomatic sovereignty.

Japanese authorities forced Gojong to abdicate in favor of his son, Sunjong, after Gojong sent a secret envoy to the Hague Peace Conference to protest Japanese control. The abdication was part of Japan's consolidation of power over Korea.

Gojong died suddenly, with rumors of poisoning by Japanese agents. His funeral on March 1, 1919, became a catalyst for the March First Movement, a massive nationwide protest against Japanese rule. The movement was brutally suppressed but galvanized Korean independence efforts.

Nurhaci completed the unification of the fragmented Jurchen tribes of Manchuria. He organized them into the Eight Banners system, a military and social structure that became the foundation of his power. He then proclaimed the Later Jin dynasty.

Nurhaci proclaimed the establishment of the Later Jin dynasty in Manchuria, claiming legitimacy as a successor to the Jin dynasty. This act formally declared his independence from the Ming dynasty and established a rival state.

Nurhaci issued the Seven Grievances, a formal declaration of war against the Ming dynasty. The grievances listed alleged Ming injustices against the Jurchens, including interference in tribal affairs and killing of Jurchen leaders. This justified his invasion of Ming territory.

Nurhaci's forces decisively defeated a large Ming army at the Battle of Sarhu. The Ming sent four separate armies into Manchuria, but Nurhaci used interior lines to defeat them in detail. This victory secured his control over Manchuria.

Nurhaci led an invasion of Ming territory but was defeated at the Battle of Ningyuan by Ming general Yuan Chonghuan. The Ming used European-style cannons to repel the Later Jin forces. Nurhaci was wounded during the battle and died shortly after.