I live about 40 miles from Vicksburg and about every 2 years or so, some lowdown son of a female canine will sneak into the military park there. These are not only some lowlifes, but are really STUPID. The park area doesn't cover all of the fighting area. There was serious fighting all around the area, so metal detecting is ripe if you get permission from private land owners.
One more piece of info that didn't make many news pages was that the remains of an old man who disappeared about 5 years ago were found in the brush-choked gully that the MDing thieves used to enter and leave the park. The old gentleman was suffering from Dementia or something like it,when he went missing. No foul-play is suspected in his death.