I believe this to be a photo of the 1898 Light Battery A of the Missouri militia.  This includes what looks like a young boy and his dog with the militia.   There is discoloration of the photo.  The photo was taken by Strauss Studio, Franklin Near Grand Ave St Louis, MO.  This is a great piece of history.   Please look at all photo's and ask questions before bidding. Photo including card stock is approximately 12 inches long and 10 inches tall.