Final answer:
The Battle of Pusan Perimeter was won by the United Nations and South Korean troops in the early stages of the Korean War. They successfully defended the Pusan Perimeter and pushed back the North Korean forces.
Step-by-step explanation:
The Battle of Pusan Perimeter was won by the United Nations (UN) and South Korean troops. The Pusan Perimeter was a defensive line in the southeastern corner of the Korean Peninsula, centered around the port city of Pusan.
UN and South Korean troops were forced to retreat to this area in the early stages of the Korean War. They were able to successfully defend the Pusan Perimeter and push back the North Korean forces.