South Korea ( listen), officially the Republic of Korea (Hangul: 대한민국; Hanja: 大韓民國; Daehan Minguk listen), is a sovereign state in the southern part of the Korean Peninsula. The name "Korea" is derived from Goryeo, a dynasty which ruled in the Middle Ages (an initial "G" in Korean is pronounced like an English "K").
Its neighbors are China to the west, Japan to the east, North Korea to the north, and the Korea Strait to the south. South Korea lies in the north temperate zone with a predominantly mountainous terrain. It covers a total area of 99,392 square kilometers and has a population of almost 50 million. The capital and largest city is Seoul, with a population of 9,794,304.
Archaeological findings show that the Korean Peninsula was occupied by the Lower Paleolithic period.Korean history begins with the founding of Gojoseon in 2333 BC by the legendary Dan-gun. Following the unification of the Three Kingdoms of Korea under Silla 668 AD, Korea went through the Goryeo Dynasty and Joseon Dynasty as one nation until the end of the Korean Empire in 1910, when it was annexed by Japan. After liberation and occupation by Soviet and U.S. forces at the end of World War II, the nation was divided into North and South Korea. The latter was established in 1948 as a democracy, though political turmoil and times of military rule and martial law characterized much of the period until the foundation of the Sixth Republic in 1987.