Right. It was a big war, with a lot soldiers from a lot of units criss-crossing the area. A favorable camp site for one group of soldiers would be favorable to another group. Question is, how many other units were camped on that same ground you found the Smith bullet, how many soldiers with personal weapons camped there, how many civilians with personal weapons camped there. It would be very difficult to attribute a bullet found in the ground at a site a century and a half after the war to a unit.