About the Author

J. E. Kaufmann is the author of five books on fortifications, including Hitler's Blitz krieg Campaigns and Medieval Fortress. He has appe ared on the History Channel discussing fortificati ons. He is a retired U.S. Army Corps of Engineers officer and a school teacher living in San Antonio .Robert M. Jurga is an engineer and t echnical illustrator living in Poland. His technic al drawings are found in many publications through out Europe.