The East Sussex coastline has always been Britain's frontline defence against invasion. From the forts of Henry VIII and the Napoleonic Martello Towers to the pillboxes, gun emplacements and civil defence sits of the two World Wars and the secret structures of the Cold War, the evidence of the defences can still be seen. Local author and archaeologist Chris Butler takes us to each of these sites (approximately 200 in total), describing what is to be seen today and their history. As well as a full range of illustrations there are full directions to the cites and details of access.