The William L. Babaian collection is made up of correspondence, photographs, greeting cards, and newspaper clippings related to Babaian's life and army service during the Vietnam War. The 16 items in the Correspondence series document his second term of military service. He wrote to his sister and brother-in-law, Marguerite and George Harms of Ann Arbor, Michigan, about his family. Several letters relate directly to his army experiences, including a lengthy letter in which he described his medical clinic in Vietnam (December 31, 1969) and a letter attaching two reports he composed on soldiers' health and obesity (February 10, 1970). He often attached photographs of his wife, children, and locations in Vietnam. A postcard depicts the Japanese "Aquapolis" from the 1975 World's Exposition.
Four additional Photographs show Babaian in uniform during each of his two terms of military service. The collection's Greeting cards are a humorous birthday card Babaian sent to Marguerite Harms, and a Christmas card he wrote from Korea (long after his military service), in which he described his impressions while revisiting the country. The Newspaper clippings series includes 4 clippings regarding Babaian's educational and military accomplishments.