If the Kaiser Comes: Defence Against a German Invasion of Britain in the First World War

On the night of 20 November 1914, everything pointed to the likelihood of invasion by a German army, whisked across the North Sea on a fleet of fast transports. The Royal Navy’s Grand Fleet prepared to sail south from remote bases in Scotland; shallow—draught monitors were moored in the Wash; and 300,000 troops stood by to repel the enemy on the beaches. Fortunately, the night passed without incident. For thirty years prior to the First World War, writers, with a variety of motivations, had...