Question

In the midst of the Korean War, the disagreement between President Truman and General MacArthur centered on which of the following issues?
the question of whether the president had the authority to fire MacArthur
the question of whether UN forces should have invaded China
the question of whether the invasion of Inchon was necessary
the question of whether UN forces should have reached the Yalu River

Answer 1

the question of whether UN forces should have reached the Yalu River

MacArthur wanted to pursue Communist forces to the Yalu (and even strike into China); Truman favored a limited war to avoid wider war with China/ the USSR, leading to their clash and MacArthur's eventual dismissal.