The collection contains World War I-era letters exchanged between Leo John Sunder and his family in St. Louis while he was serving in Europe, which mention the injuries Leo suffered in France during a mustard gas attack and an outbreak of Spanish Influenza in St. Louis. The collection also includes military documents relating to the service of Pvt. Leo John Sunder and Pvt. Edward R. Dependahl; a circular letter of General John J. Pershing thanking American soldiers for their service in the World War, dated February 28, 1919; certificates of marriage; State of Missouri Employment Certificates for John O’Toole and Mildred O’Toole; World War II ration books; a confirmation record for Elizabeth Robins (mother of Mildred and Loretta O’Toole); registration certificates of Edward Dependahl in the selective service; and a typed list of rules for patients at a tuberculosis camp.