Why is it the forgotten war?

This is one of the most famous pictures on the internet. Kim Jong-il has his lights on, but the rest of the country is without electricity. Sixty years ago today 90,000 North Korean troops, backed by Soviet communist tanks, invaded South Korea. It is called America's Forgotten War. Why have we forgotten? America had no reason to fight there, except Harry Truman was determined to prevent the enslavement of the people in South Korea. He remembered Mussolini and Hitler. It is a great shame that we have forgotten the many thousands of Americans who fought to protect the freedom of the people of South Korea.