No- the United States didn’t lose the Korean war, as the primary goal of the United States was achieved, South Korea was defended. The border of North and South Korea that was set by the cease fire that was signed in 1953 was the same as it was before the war. read more
The Korean War (in South Korean Hangul: 한국전쟁; Hanja: 韓國戰爭; RR: Hanguk Jeonjaeng,"Korean War"; in North Korean Chosŏn'gŭl: 조국해방전쟁; Hancha: 祖國解放戰爭; MR: Choguk haebang chǒnjaeng,"Fatherland: Liberation War"; 25 June 1950 – 27 July 1953) was a war between North Korea (with the support of China and the Soviet Union) and South Korea (with the principal support of the United States). read more