Final answer:
The United Nations took action regarding the Loren war in the 1950s by forming a coalition force led by the United States to help South Korea defeat the invading North Korean forces.
Step-by-step explanation:
In the 1950s, the United Nations took action regarding the Korean War. When North Korea invaded South Korea in 1950, the United Nations Security Council denounced North Korea's actions and called upon UN members to help South Korea defeat the invading forces.
The United Nations formed a coalition force led by the United States and eventually pushed the North Korean forces out of South Korea, leading to a stalemate and the establishment of a demilitarized zone between the two countries.