There are two photographs that exist showing Civil War soldiers, posing with a dead Pterosaur dinosaur. Both of them are interesting but only one is believed to be real. The other was faked for the FreakyLinks television show, back during 2000-2001. The one in question, appears to show six different soldiers carrying rifles.
This photograph would have been taken sometime between 1861 to 1865. This was the time in history, when war broke out between the North (Union) and the South (Confederacy).
Certainly anyone with enough technical know-how, could create such a photograph and make it look believable. However, the same is not true about what was written in many history books. But what really do we know for sure really happened? Much of what was documented is likely not true.
Read more here: https://www.freaklore.com/old-photograph-shows-civil-war-soldiers-posing-with-dead-pterosaur