Defending London describes the various elements of London's military heritage, and places them in their historical, archaeological and social context. From the castles and strong houses of the medieval and Tudor monarchs and statesmen, to the pseudo-fortresses of the Victorian militia and rifle volunteers; the airfields of teh anti-Zeppelin fighters of the Royal Flying Corps, and the Battle of Britain bases of the RAF, to the pillbox defences against invasion of 1940, and teh anti-nuclear defences of the Cold War, and beyond.