<P> This division of Korea , after more than a millennium of being unified , was seen as controversial and temporary by both regimes . From 1948 until the start of the civil war on June 25 , 1950 , the armed forces of each side engaged in a series of bloody conflicts along the border . In 1950 , these conflicts escalated dramatically when North Korean forces invaded South Korea , triggering the Korean War . The North overran much of the South until pushed back by a US - led United Nations intervention . The UN forces then occupied most of the North , until Chinese forces intervened and restored communist control of the North . </P>
<P> This division of Korea , after more than a millennium of being unified , was seen as controversial and temporary by both regimes . From 1948 until the start of the civil war on June 25 , 1950 , the armed forces of each side engaged in a series of bloody conflicts along the border . In 1950 , these conflicts escalated dramatically when North Korean forces invaded South Korea , triggering the Korean War . The North overran much of the South until pushed back by a US - led United Nations intervention . The UN forces then occupied most of the North , until Chinese forces intervened and restored communist control of the North . </P>
what did north korea do to south korea
what did north korea do to south korea
invaded
invaded