A three-day revolution in 1884 attempted to modernize Korea by emulating Meiji Japan.

A three-day revolution in 1884 attempted to modernize Korea by emulating Meiji Japan.
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In short: In December 1884, a group of radical reformers staged a daring coup in Seoul, seizing the royal palace to dismantle Korea's conservative, pro-Chinese order. Their vision for a constitutional monarchy and legal equality lasted only three days before a massive Chinese military intervention crushed the movement and forced them into exile.

The Kapsin Coup was driven by the Enlightenment Party, a cohort of young, well-educated reformers who were deeply impressed by Japan's rapid modernization. Led by Kim Okkyun, these men were frustrated by the slow pace of change and the growing influence of the Min clan, which had monopolized power and pursued a pro-Chinese policy after the 1882 Imo Incident. The reformers sought to end Korea's tributary status, abolish class privileges, and establish a modern, centralized state.

The opportunity to strike arrived in December 1884, when conflict between France and China forced the withdrawal of half the Chinese garrison in Seoul. During a banquet celebrating the opening of a new post office, the reformers seized King Gojong and attempted to install a new government. Their ambitious 14-point program included radical proposals such as land tax reform, the creation of a modern police force, and the unification of internal fiscal administration under the Ho-jo.

The coup failed because the reformers were vastly outnumbered. Supported by only 140 Japanese troops, they faced 1,500 Chinese soldiers commanded by Yuan Shikai. Queen Min requested Chinese intervention, and within three days, the coup was suppressed. The aftermath saw the death of key reformer Hong Yeong-sik, the burning of the Japanese legation, and the flight of leaders like Kim Okkyun and Philip Jaisohn to Japan. The event solidified Chinese dominance in Korea until 1894, with Yuan Shikai remaining in Seoul as a powerful Resident-General.

The failure of the coup had lasting geopolitical consequences. It led to the Treaty of Hanseong in 1885, where Korea paid reparations to Japan, and the Convention of Tianjin, where China and Japan agreed to withdraw their troops. This created a precarious balance of power that ultimately failed to prevent further foreign interference, as the coup had effectively derailed the moderate reform efforts that had been gaining momentum since the 1883 mission to the United States.

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