This is a bit more Donald’s thing than mine, but it is simply too neat to not share– a site called Civil War Photo Sleuth (CWPS) is collecting all the photographs they can (you can upload them, anonymously if you like), sorting them using facial recognition software, and people are picking out clues such as insignia and noting them down.
Per Vintage News:
The official CWPS website was launched in August 2018 by Kurt Luther and his students at Virginia Tech, Ron Coddington an editor for Military Images, and Paul Quigley, head of the Virginia Center for Civil War Studies.
Since then they have identified around 75 photographed individuals and have many more eligible for comparison.
The people behind this webpage are striving to create the world’s most comprehensive database of Civil War photographs that would include not only soldiers and sailors but also civilians.
The page is in the process of connecting with the Digital Public Library of America and a host of different museum, library, and cultural institution’s archives around the globe.
CWPS users have complete control over how they want to display the photographs they submit and can also post anonymously.
They can share their photos only with specific people, or make them public for all group members.
Even if you don’t want to sign up, they’ve got a very nice resource page.