Led by Park Chung-hee, the Military Revolution Committee carried out a bloodless coup against the government of Yun Posun in Seoul, ending the Second Republic of Korea.

Park Chung Hee was a South Korean politician and army officer who served as the third president of South Korea from 1962 after he seized power in the May 16 coup of 1961 until his assassination in 1979. His regime oversaw a period of intense economic growth and transformation, making him one of the most consequential leaders in Korean history, although his legacy as a military dictator continues to cause controversy.

The May 16 military coup d'état was a military coup d'état in South Korea in 1961, organized and carried out by Park Chung Hee and his allies who formed the Military Revolutionary Committee, nominally led by Army Chief of Staff Chang Do-yong after the latter's acquiescence on the day of the coup. The coup rendered powerless the democratically elected government of Prime Minister Chang Myon and President Yun Posun, and ended the Second Republic, installing a reformist military Supreme Council for National Reconstruction effectively led by Park, who took over as chairman after Chang's arrest in July.

Yun Po-sun was a South Korean politician and activist who served as the second president of South Korea from 1960 to 1962. He was the only president of the short-lived Second Republic of Korea, and served as little more than a figurehead due to its nature as a parliamentary system.

The Second Republic of Korea was the government of South Korea from June 1960 to May 1961.