Answer:
because alot of things are made in korea and the U.S needs them to make things. russia and china were not very involved in the war. After three years of a bloody and frustrating war, the United States, the People's Republic of China, North Korea, and South Korea agree to an armistice, bringing the fighting of the Korean War to an end. The armistice ended America's first experiment with the Cold War concept of “limited war.”
Combatants: North Korea, South Korea
Start date: June 25, 1950
The impact of the Korean War on the civilian population was especially dramatic. Korean civilian casualties - dead, wounded and missing - totalled between three and four million during the three years of war (1950-1953). The war was disastrous for all of Korea, destroying most of its industry.