An interesting video about civil war bullets found inside trees:
I live about 20 miles from the Gettysburg Battlefield and seen a version of this on our local news. This particular tree was broken in a wind storm and the park decided to cut it down. That’s when they discovered the lead round in the cross section. They are currently cutting down a lot of trees on the battlefield to make it look more like it did during the battle. Since these will probably be newer trees they shouldn’t find any more rounds in the wood.