Sure. There was a case where a soldier's diary was found years after the war. In it, he described seeing a strange light in the sky during a battle. It wasn't like any known signal or natural phenomenon. Another strange story was about a horse that refused to move forward on a particular path. When the soldiers forced it, they discovered a hidden trap that the enemy had set up. If they hadn't noticed, it could have been a disaster for the whole unit.
One of the strange stories is about a regiment that suddenly started hearing music from an unknown source during a night march. It was a beautiful yet haunting melody. They followed the sound, thinking it was from their own side, but it led them to an abandoned churchyard. There, they found no one. Some soldiers thought it was a supernatural sign. Another story is about a civil war nurse who reported seeing a figure in white that seemed to be helping the wounded soldiers. But when she tried to approach it, it disappeared. No one knew who or what it was.
There are stories of soldiers who, during a siege, found a secret tunnel. But instead of it leading to safety or an advantage, it was filled with old bones and strange symbols carved on the walls. They were so spooked that they quickly left. Also, there was a strange incident where a flag, which was supposed to be a symbol of a regiment's pride, was found floating in the air by itself in the middle of a battlefield. No one could explain how it got there or why it was floating without any support.