<Li> <P> Keijo Nippo Company Building . </P> </Li> <P> Keijo Nippo Company Building . </P> <P> After World War II and Korea's liberation, the city took its present name of Seoul . When the Republic of Korea (South Korea) was declared, the new state adopted the city as its capital . In 1949, Seoul administrative area expanded to Ui - dong to the north, and Guro - dong and Daerim - dong to the south, recombining some areas which were annexed from original Seoul to Goyang County in 1914 . </P> <P> In 1950, the Korean War broke out and Seoul changed hands between the North Korean forces and South Korean forces four times, leaving the city largely destroyed at the end of the war . One estimate of the extensive damage states that at least 191,000 buildings, 55,000 houses, and 1,000 factories lay in ruins . In addition, there were a flood of refugees from the North, swelling the city's population to an estimated 2.5 million persons . More than half of them were homeless . </P>

When did seoul become the capital of south korea
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