Examines how the Channel Islands have been crucial to Britain's successful maritime superiority in the English Channel. The Channel Islands have played a key role in both naval warfare and Anglo-French diplomacy, but this has not always been highlighted sufficiently even though Britain and France were at war for most of the period 1689-1815. This book considers a wide range of maritime subjects where the role of the Channel Islands has been significant, such as intelligence gathering, piracy and privateering, and naval strategy and control of the Channel. It also examines topics in relation to the Channel Islands specifically, such as surveying and hydrography, fortifications, trade and Channel Islands societies. It charts changes over time, including the impact of technological changes, from the wars of Louis XIV and William III, through the many Anglo-French wars of the eighteenth and early nineteenth centuries, and includes planning for wars which were anticipated but avoided. Throughout the issues are discussed from the perspectives of Britain, France and the Channel Islands themselves, equal weight being given to all three perspectives. Andrew Lambert is Professor of War Studies at King's College, London and one of Britain's foremost maritime and naval historians. Colin Partridge is a former consultant to the States of Guernsey's 'Fortress Guernsey' programme for the restoration and interpretation of Guernsey's fortifications. Jean de Preneuf is a Senior Lecturer at the University of Lille and Head of the Research, Teaching and Studies Unit at the Historical Branch of the French Ministry of Defence at Vincennes.