Book excerpt: This book details British fortifications used from the Tudor period beginning in 1485 through the end of World War II in 1945. With the advent of firearms, the Tudor period indeed opened a new chapter in the histories of Britain, fortification and warfare. By 1500 AD, Britain and Europe at large entered a new phase, marked by the foundation of colonial empires and a broadened sphere of influence and rule. During the following centuries, British sailors, ruthless adventurers, fighting men, and greedy merchants laid foundations to fortify the most widespread and most prosperous colonial Empire the world had ever seen. This text focuses on British coastal fortifications and on combinations of fortresses used for more general strategic purposes. Featured structures have protected points of vital importance, such as capital cities, military depots, ports, harbors and dockyards at essential locations in Britain and throughout the British Empire.