The American Battlefield Protection Program, National Park Service, where I worked before retirement, has supported archaeological study at various Civil War battlefields. There is also a new book out, "Look to the Earth: Historical Archaeology and the American Civil War" (University of Tennessee Press), that includes some essays on battlefield archaeology. Additionally, you can find various published archaeology studies on archaeology at battlefields from the many American wars. Yes, a great deal of battlefield archaeology has occurred. Dale E. Floyd