In the late-19th century, with the advances in technology and the increase in America's economic stature, a new round of fortification building began in the United States and its overseas territories. Locations such as Portland, Boston, New York, Baltimore, Charlestown, Savannah, Key West, Los Angeles and San Francisco were all extensively fortified. This book provides a concise introduction to the design, development and purpose of American coastal defenses in the modern era (1885–1950), a period defined by the use of concrete, steel, and powerful breech-loading rifles. It covers the emplacements, weaponry, equipment, and people that defended their country in times of great change and uncertainty.

Terrance McGovern has been an avid student of fortifications for many years, with a particular interest in American coastal defenses in overseas territories. He has published articles in the CDSG Journal, Fort, Casemate, and several other fortification publications. A former Chairman of the Coast Defense Study Group, Terrance lives in McClean, Viriginia, with his wife and three daughters.

Bolling Smith received his BA in History from Furman University in 1971. A former captain in the US Army Reserve, he served with the Washington DC Metropolitan Police Department for 28 years, retiring as a captain. 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.