1890 Veteran's CensusThe U.S. Pension Office requested this special enumeration to help Union veterans locate comrades to testify in pension claims and to determine the number of survivors and widows for pension legislation. (Some congressmen also thought it scientifically useful to know the effect of various types of military service upon veterans' longevity.) To assist in the enumeration, the Pension Office prepared a list of veterans' names and addresses from their files and from available military records held by the U.S. War Department.