The Korean War occurred after the end of World War II. The conflict was between Communist and non-Communist forces in Korea from June 25th, 1950, to July 27th, 1953. The war was supported primarily by the United States of America, with donations from allied nations under the tutelage of the United Nations. Visit http://en.wikipedia.org/wiki/Korean_War for more details.
For the longest time it was called "a police action". Formal war was never declared but the US finally accepted it as "The Korean War. Vietnam started out as a "police action also". The numeric designation usually is reserved for "World Wars" where you have many countries involved.
The one that never officially ended,no peace papers were ever signed,technically it's just a cease fire and still is considered a war! Check it out if u don't believe me! Sad but true! Prove me wrong! And did u know this country was founded by a beer run? Pilgrimage Aran out of beer,set up a brewery at Plymouth,and brewed beer! Ask the history teach that one!