Daniel M. Sivilich is a battlefield archaeologist with more than thirty years' experience in the field and over 40 years of experience using metal detectors. He is one of the founders of the concept of electronic battlefield archaeology and has developed many new methods, both in field techniques and data analysis. He has authored numerous scholarly and popular articles on Revolutionary War-era historical archaeology. Dan has a BS in Chemical Engineering and has applied those skills to conflict archaeology such as developing the Sivilich Formula used to calculate the original diameter of a non-spherical musket ball. He is the author on the definitive work Musket Ball and Small Shot Identification: A Guide.