1991
South Korea was rejected by communist security council members, China and USSR, for many years, saying that South Korea was just a US Military post.
It caused China to enter the Korean War.
There definitely were Red Chinese Troops in Korea!
Yes, North Korea is an active member of UN.
The UN fought in Korea.
Kim Jong-un has ruled in North Korea for about 4 years.
China sent troops to help North Korea. The UN states
The current dictator of North Korea is Kim Jung Un 김정은 (as of 2014).
The US is a member of the UN and the UN agreed to assist South Korea aginst North Korea.
they wanted to defend south Korea and restore peace
The UN fought North Korea, Red China. The US was part of the UN.
South Korea! North Korea consists of a lack of food and Kim Jong Un
US/UN forces invaded North Korea and were driving towards the Chinese Communist (Chicom) border. Not knowing if the US/UN forces were going to stop there...or keep going...Red China counter-attacked.