According to Wiki, The Battle of Wauhatchie was one of the few night battles of the Civil War. I believe that since fighting at night would have been fraught with danger, not the least of which would be shooting your compatriots by mistake.
I assume that both the Union and Confederate armies had oil filled lamps or lanterns, and that they made campfires, but did they have other sources of light they could use during a battle? Did they have torches they could carry with them to light their way? Wouldn’t torches, lanterns and campfires tip off your enemy to your precise location?
I guess what I’m asking is why would you ever want to fight a night battle during the Civil War, unless there was a full moon or you happen to be invading a town that was well lit. So many things could go terribly wrong.
Did your source mention the phase of the moon on that night?
I can’t imagine starting a fire AND staying near it - you could use fires with some kind of directional screening (to make it invisible from the east, for instance) and set them to burn a long time.
Then use them to establish direction and orientation - while a good distance from them.
There’s no way it could work. Once you fired the first shot, of worse, the first volley; you would have simultaneously blinded yourself and given away your exact position.
Maybe that’s why they didn’t do it very often. Why did they do it this time? For the element of surprise, which worked well. But if you don’t win immediately, things could go terribly wrong.
In war, you want things to go terribly wrong… for your enemy. If you think that fighting by night will hurt your enemy more than it’ll hurt you, it just might be a reasonable tactic.
The Union was rapidly establishing a viable logistics line into a place the Confederates did NOT want them.
They attacked the supply convoy as soon as they could muster enough troops - time was exceedingly critical - that convoy could NOT be allowed to pass.
They planned to attack at 10:00 P.M. - but screwed up and didn’t get started until midnight - by which time the USA troops had figured out that an attack was likely, and had established pickets to sound the alarm.