A documentary titled 'Hell For Leather' shows combat activities of the U.S. 1st Cavalry Division during wars. Dramatization shows a 1st Cavalry soldier seated on a step and his son touches the insignia of the U.S. 1st Cavalry division on the uniform. Reenacted footage of Cavalry unit battling Native American Indians at the Battle of Little Big Horn. Next scene shows training of U.S. Army cavalry troops for World War 2, as they run an obstacle course and practice bayonet drills. The troops undergo combat training. They practice amphibious landings and crawling near razor wire. Animated map shows the amphibious attacks on Los Negros Island in 1944. A ship underway and soldiers on the deck of the ship. Ship guns are fired in Battle of Los Negros. The U.S. Army troops load a Landing Craft and it gets underway. They approach the shore and get off from the landing craft at the beach. The troops hold guns and advance in jungle region, firing rifles and machine guns, engaging enemy Japanese marines protecting the airfield. The U.S. Army troops firing and advancing against the Japanese. The wounded soldiers on a stretcher. The soldiers fire artillery and mortars. View of dead Japanese troops. The U.S. troops advance. U.S. General MacArthur praises a soldier. 'Bataan' written on the barrel of a gun.
Americans win new air bases from Japan in South Pacific during World War II. Americans bombers fly towards Japanese targets in the South Pacific. Planes drop bombs on enemy positions. Explosion along the coast. Smoke rises up. Animated picture show Manus in the Admiralty Islands. American troops shell the island. U.S. cavalrymen land on the Los Negros Island and march forward. Soldiers load and fire artillery. Soldiers carry the wounded on stretcher. Dead Japanese soldiers. Soldiers move towards the airstrip on the island. Wrecked Japanese planes. Heavy equipment on the airstrip. American planes at the airstrip.