You can find an article in the Walker County Messenger August 28, 1884 tells of a reunion of the 3rd Confederate Cavalry at Collinsville Alabama, held on August 20, 1884.
You can read this artical at https://gahistoricnewspapers.galileo.usg.edu/lccn/sn89053488/
Click on search at top (will bring up Advanced Search)
skip down to Word Proximity
Search Pages containing the words: type in 3rd Confederate Cavalry - choose within 1 word of each other.
Skip down to Newspapers: Click in the Select Some Option and pick Walker County Messenger. (Lafayette Georgia)
Click on the Search button and it should bring up the 3 articles with the words 3rd Confederate Cavalry.
Good read, hope this helps someone