A history of the U.S. involvement in the Korean War.American troops exiting a carrier on a beach. Hundreds of soldiers gathered on a road. Troops wearing winter coats walking down country roads. Groups of North Koreans. A panning shot of Korean Christians, praying with their heads bowed. A map with animated arrows diagonally bisecting Korea above the 38th parallel, moving north. Trucks driving slowly along a curving mountain road. Soliders on foot in the mountains, pushing and carrying supplies. Korean and Chinese prisoners being marched down a road. Chinese soldiers wearing quilted uniforms. American cargo ships buffeted by waves in the Northern Sea of Japan. Cargo being removed a ship to another via a zip line. A solider shovels snow off a ship. Planes on an aircraft carrier in a snowstorm. Mechanics working on the planes in the snow. Propellors turning. A map with animated arrows diagonally bisecting Korea, moving north, reaching the Chinese border. Long shots of the geography of the village of Hi San Jin (?), at the banks of the Yalu River and surrounded by mountains. American soliders in the mountains. CUs of the soldiers.