Terrance McGovern has written several fortifications books and authored articles in international fortification journals. He has received degrees from Georgetown University and Tulane University. Terrance lives in McLean, Virginia. Bolling Smith is a former captain in the US Army Reserve. A former chairman of the Coast Defense Study Group, he has edited the Coast Defense Journal for over a decade. He lives in Maryland, USA.

Peter Bull graduated from art college in 1979 and has worked as a freelance illustrator for over 25 years. He has created both traditional and digital art for publishers worldwide, and also runs the Peter Bull Art Studio, based in Kent, UK, which he founded in 1975. Peter Chesterton has worked closely with Peter Bull on the subject matter of this book.
Terrance McGovern has authored five books and numerous articles on fortifications, three of those books being for Osprey's Fortress Series (American Defenses of Corregidor and Manila Bay 1898-1945; Defenses of Pearl Harbor and Oahu 1907-50; American Coastal Defences 1885-1950). He has also published eleven books on coast defense and fortifications through Redoubt Press or CDSG Press. The CDSG Press (www.cdsg.org) is part of the US based Coast Defense Study Group (non-profit organization dedicated to the study of coastal fortifications), where Terry has been its Chairman and continues to be a long-time officer. He has also been the editor of the UK based Fortress Study Group annual journal, FORT. He also a director of the International Fortress Council and Council on America's Military Past.