CNN  —  Seventy-five years ago this week, more than 135,000 North Korean troops invaded South Korea, starting a war that cost millions of lives and left scars that linger to this day. Yet, the Korean War has been forever overshadowed by World War II, a much larger conflict that ended less than five years earlier. Even the US Army refers to Korea as “the Forgotten War” – despite more than 36,000 American lives lost. Sixteen nations, including the United States, sent combat troops in aid of South