Why and With what Success Did the UN Intervene in the Korean War?

The United Nations intervened in the Korean War due to the advantage the US had in the Security Council, the need for it to be established as an organization with real force and the mission to eliminate aggression between the Koreas.
UN corps would never have allied with the US on the police action if the Soviet Union had not been boycotting during the passing of the resolution. Considering North Korea was a fellow communist country, and how the Russians eventually supplied the Northern side with all of their weapons and tanks, the USSR would have vetoed the plan if the representatives were present at the time. China, too could be considered underrepresented since only Taiwan had a say in the security council. With the two communist giants away from the conference table, the US only had two other of amiable allies and a handful of GA countries that would not dare to stand up to the most influential nation in the UN. …