The full history of fortification and defensive technology is explored in FORTRESS, a new series from Osprey. Using locations which have withstood some of the most important clashes in the history of warfare across the ages Fortress offers a comprehensive and structured survey of the world’s most significant forts, defensive systems and strategic positions.

Written by military professionals, archaeologists, architects and experts, each book in the series shares the same clear and comprehensive chapter structure and come complete with the usual Osprey full, colour artwork.
The first four titles – Japanese Pacific Defenses 1941-45, Hadrian’s Wall AD 122-410, U Boat Bases and Bunkers 1941-45 and the American Defenses of Corregidor and Manila Bay 1898-1945 – have just been published and a further ten are due for publication throughout the year.