I find an ancestor listed at Family Search with this:
Name: Nimrod Long
Document Type: Citizen
Document Number: 81
Affiliate Publication Title: Confederate Papers Relating to Citizens or Business Firms
Affiliate Publication Number: M346
Affiliate Film Number: 598
"United States Civil War Confederate Papers of Citizens or Businesses, 1861-1865," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VW1S-2H3
: 4 December 2014), Nimrod Long, 1861-1865; from "Confederate Papers Relating to Citizens or Business Firms, 1861-1865,"
What is ʻConfederate Papersʻ? Does it indicate he was a Confederate Soldier? In another citation he is Iowa Infantry - I need to learn about that, right?