What were 3 major turning points of the korean war, and why were they important?

Question: What were 3 major turning points of the korean war, and why were they important!?
Best Answer - Chosen by Asker:

Communist China entering into the war!. Threw millions of soldiers against the UN
The landing at Pusan by American troops!. Made the communists fight on two fronts and cut their supply lines!.
Truman firing MacArthur, thus saving a larger war and making a chance to settle the war peacefully!.Www@QuestionHome@Com