U.S. 12th Field Artillery Regiment in action in Bois De Belleau, (Belleau Wood), France during World War I. The troops are wearing masks. The soldiers load shells in a field gun. Wooden boxes in the background. The soldiers sit in a dry grassland and are read papers. A soldier on a radio. A field switchboard attached on a wooden log. A U.S. officer looks at a map and draws a line on it. The troops seated on the ground look at the map. The soldier talks over the radio. The soldiers put shells in the wooden boxes.