They are improvisational wars. This fractured the already-stretched North Korean supply line. During the time of the Korean War communism was an enormous threat that was sweeping across Asia at an alarming rate that terrified many western countries including the United States.
Those who fought there have said that, at a heavy cost, they accomplished their objective. Furthermore, relations with communist ally China were seriously and permanently spoiled, leading to the Sino-Soviet split that lasted until the collapse of the Soviet Union in In this paper, the international background of the Korean War and US foreign policy before the Korean War will be explained firstly.
Southern Korea was about to be woken up for a crude awakening. The United States' strong resistance to the invasion may have prevented a Soviet intervention in Yugoslavia during the Tito-Stalin split.