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Rise of the Manchus

Originally a Ming vassal who officially considered himself a guardian of the Ming border and a local representative of imperial Ming power, Nurhaci, leader of the Jianzhou Jurchens, unified other Jurchen clans to create a new Manchu ethnic identity. He offered to lead his armies to support Ming and Joseon armies against the Japanese invasions of Korea in the 1590s. Ming officials declined the offer, but granted him the title of dragon-tiger general for his gesture. Recognizing the weakness of Ming authority in Manchuria at the time, he consolidated power by co-opting or conquering surrounding territories. In 1616 he declared himself Khan and established the Later Jin dynasty in reference to the previous Jurchen-ruled Jin dynasty. In 1618 he openly renounced the Ming overlordship and effectively declared war against the Ming with the " Seven Grievances."

In 1636, Nurhaci's son Hong Taiji renamed his dynasty the " Great Qing " at Mukden (modern Shenyang), which had been made their capital in 1625. Hong Taiji also adopted the Chinese imperial title huangdi, declared the Chongde ("Revering Virtue") era, and changed the ethnic name of his people from "Jurchen" to " Manchu ". In 1636, Banner Armies defeated Joseon during the Second Manchu invasion of Korea and forced Joseon to become a Qing tributary. Shortly after, the Koreans renounced their long-held loyalty to the Ming dynasty.