In a sense the US with the help of the UN won because we defeated North Korea's attempt to take over South Korea. North Korea was attempting to unite the two halves that were artificially created after WWII. read more
Neither side actually won the Korean War. In fact, the war goes on to this day, since the combatants never signed a peace treaty. South Korea did not even sign the Armistice agreement of July 27, 1953, and North Korea repudiated the armistice in 2013. read more
On June 25, 1950, the Korean War began when some 75,000 soldiers from the North Korean People’s Army poured across the 38th parallel, the boundary between the Soviet-backed Democratic People’s Republic of Korea to the north and the pro-Western Republic of Korea to the south. read more