Carlisle, Pennsylvania. Demonstration before Army doctors and officer candidates at the U.S. Army medical field service school. Three company aid men, (i.e., unarmed medical soldiers), are attached to each infantry company as well as other fighting units, and move with them into thick of battle. When a wounded man falls he administers first aid, and puts a tag on his bayonet for the litter bearers to find. Sourced from the Library of Congress.