South Korea, officially the Korean Kingdom, was a constitutional monarchy that governed the southern half of the Korean peninsula from 1953 to 1988.
Following the Japanese Civil War, the Japanese Government fled to Korea. Korean nationalists overthrew the Royal Family's government and reinstated the Korean monarch and re-created the Korean Empire on November 16, 1953. Shortly afterward, the remainder of the Imperial Army overthrew the Korean monarch and reinstated Akihito as ruler of Korea on November 29, 1953. To prevent another coup, Akihito signed the Akihito Constitution, the successor to the Meiji Constitution. Korea became a constitutional monarchy independent of Japan, with Akihito becoming the Emperor of Korea, a powerless figurehead with absolutely no authority, while southern Korea would be controlled by a democratically-elected parliament and prime minister. A new democratic government took control of the remainder of Japanese-controlled Korea, creating the Korean Kingdom on December 1, 1953.
Effort to reunify
Throughout their existence, governments of North and South Korea attempt to unify the peninsula. A series of negotiations between the 2 countries lead to the creation of the Korean Pact, an economic and political union between to the 2 countries. This union grew into a confederacy, as the 2 nations would act as 1, if each government unanimously agreeing on an issue. Both government slowly granted power over their territory, and combined their armies into one: the "Korean People's Liberation Army". As the 2 countries drifted closer together, both began to discuss unification. On January 31, 1988, both nations voted for unification. On February 12, 1988, both governments finished drafting a constitution, which was ratified 5 days later. This brought an end to Korea's division, with both governments in a constitutional union with each other.