This educational pamphlet was written by Charles L. Robinson and published in 1918 by the YMCA and American Defense Society. It cautions American soldiers of the health risks posed by venereal disease and encourages the troops to be true to their wives and sweethearts back home. The pamphlet was widely distributed to American soldiers serving in France during World War I. (U.S. Air Force photo)

This educational pamphlet was written by Charles L. Robinson and published in 1918 by the YMCA and American Defense Society. It cautions American soldiers of the health risks posed by venereal disease and encourages the troops to be true to their wives and sweethearts back home. The pamphlet was widely distributed to American soldiers serving in France during World War I. (U.S. Air Force photo)

This educational pamphlet was written by Charles L. Robinson and published in 1918 by the YMCA and American Defense Society. It cautions American soldiers of the health risks posed by venereal disease and encourages the troops to be true to their wives and sweethearts back home. The pamphlet was widely distributed to American soldiers serving in France during World War I. (U.S. Air Force photo)

This educational pamphlet was written by Charles L. Robinson and published in 1918 by the YMCA and American Defense Society. It cautions American soldiers of the health risks posed by venereal disease and encourages the troops to be true to their wives and sweethearts back home. The pamphlet was widely distributed to American soldiers serving in France during World War I. (U.S. Air Force photo)

This educational pamphlet was written by Charles L. Robinson and published in 1918 by the YMCA and American Defense Society. It cautions American soldiers of the health risks posed by venereal disease and encourages the troops to be true to their wives and sweethearts back home. The pamphlet was widely distributed to American soldiers serving in France during World War I. (U.S. Air Force photo)

This educational pamphlet was written by Charles L. Robinson and published in 1918 by the YMCA and American Defense Society. It cautions American soldiers of the health risks posed by venereal disease and encourages the troops to be true to their wives and sweethearts back home. The pamphlet was widely distributed to American soldiers serving in France during World War I. (U.S. Air Force photo)