Voters in South Korea overwhelmingly approve a new constitution, giving legitimacy to Park Chung Hee and the Fourth Republic.

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 Fourth Republic of Korea was the government of South Korea from November 1972 to February 1981.