10: Civil War - 8d

If you found this written on the back of a photograph, a document, or a storage box, it likely follows a standard archival format:

During the war, "Sanitary Fairs" were held to raise money for Union soldiers. Collectors often seek out items like the 10-cent Sanitary Fair Stamp sold through eBay, which are categorized by specific alphanumeric codes in dealer inventories. 2. Archival or Inventory Coding 10 Civil War - 8d

Could represent Box 10 or Folder 10 in a specific collection. Civil War: The primary subject matter of the contents. If you found this written on the back

Knowing if it was in a product listing , a library archive , or a family heirloom would help me give you a much more precise description. Archival or Inventory Coding Could represent Box 10

Less commonly, this may refer to a specific military designation, though it doesn't fit the standard U.S. Army "Regiment/Company" format perfectly.

It might refer to the 10th Cavalry or 10th Infantry , with "8d" being a specific platoon or squad notation used in modern historical gaming or reenactment databases.