My wife and I were at Chickamauga battlefield the other day. She posed a question that I've never thought about before about unit markers. She asked how did they know where to put the markers? I've been in combat and it can be extremely confusing and scary. With all the confusion, smoke and destruction, how did veterans of a battle remember what section of the woods they had been in. Especially a forested battlefield like Chickamauga. Or the exact spot where General so-and-so get killed?