During the Civil War, at the Battle of Shiloh, Confederate soldiers surprised Union soldiers camped near the Tennessee River.
After the battle was over, the surviving soldiers were stuck, waiting for medics to arrive, sitting in the rain, and mud for two days with untreated open wounds. In those days a small cut could get infected and kill a man.
At night the soldiers noticed that their wounds were glowing in the dark.
It was soon noticed that soldiers with glowing open wounds had a better survival rate than those who didn’t. It was thought that some form of supernatural healing was being done to them by unseen helpers, thus the name “Angel’s Glow” was coined.
This is where it gets a bit creepy slash fascinating:
The soldiers were infected with roundworms (nematodes).
These roundworms burrow into flesh and regurgitate bacteria that devours germs and harmful bacteria that otherwise would have lead to an infection in the soldiers.
This bacteria is called Photorhabdus luminescens, and it’s bioluminescent with a soft blue glow.