The S.Koreans asked for the UN help.
The UN fought in Korea.
...nothing...
they were involved by sending troops to help south Korea fight north Korea.
Countries that were members of the UN (United Nations) sent troops to the war.
The UN.
to rid North Korean and Chinese force from South Korea
UN
The UN (United Nations).
money lol
to clear south Korea from occupation by north Korean and Chinese troops
It was an undeclared war.
UN-United Nations