Documentary, Military Documentaries, Historical Documentaries - When the North Korean People's Army crossed the 38th parallel and invaded the Republic of Korea, one of the first actions U.S. President Harry S. Truman took was to call in the Marines -- a unit of elite soldiers known for their stoicism, pride and bravery. Using fascinating archival footage, this retrospective program traces the Marines' pivotal role in preventing the spread of communism, focusing on the highlights of their courage in conflict.