Scope and Contents 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...