Park Chung-hee Leads Military Coup in South Korea

Context

Following the end of Japanese colonial rule and the Korean War, South Korea under President Syngman Rhee had developed a conservative political order dominated by a narrow elite often called the “liberation aristocrats.” Rhee’s long tenure featured patronage networks, limited economic progress, and fierce anti-communism, leaving the country agrarian and underdeveloped despite earlier Japanese-era infrastructure. Growing discontent culminated in the April Revolution of 1960, which forced Rhee’s resignation after rigged elections sparked widespread protests.

What Happened

The Second Republic that followed adopted a parliamentary system with Yun Posun as president and Chang Myon as prime minister. It quickly faced factional infighting within the ruling Democratic Party, soaring unemployment above 20 percent, rapid inflation, and persistent student demonstrations. Within the oversized South Korean army, junior officers chafed at senior commanders they viewed as corrupt and politicized, while promotion bottlenecks and regional and academy-based factions added tension. Park Chung-hee, a major general with ties across these networks, emerged as a central figure in planning a takeover.

Aftermath

On the morning of May 16, 1961, troops loyal to the Military Revolutionary Committee moved on key government buildings and communications centers in Seoul. Resistance proved minimal; Army Chief of Staff Chang Do-yong acquiesced and lent his name to the operation. The National Assembly was dissolved, political parties and activities were banned, and martial law was declared. A Supreme Council for National Reconstruction assumed power, initially under nominal leadership of Chang Do-yong before Park consolidated control.

Legacy

Park’s subsequent eighteen-year rule transformed South Korea through export-oriented industrialization and state-directed development, laying the foundation for the later “Miracle on the Han River.” At the same time, the coup entrenched patterns of military intervention in politics that continued into the 1980s and postponed full democratization until the late twentieth century. Official narratives long celebrated the event as a necessary “revolution,” but later governments reclassified it as a coup, reflecting ongoing debates over its authoritarian costs and developmental gains.