In October 1990 West German General Jorg Schonbohm and a small team of experts moved into the headquarters of the former East German army to effect the unprecedented: the takeover, in peacetime and without the firing of a single shot, of a well-equipped army that had been the Bundeswehr's main enemy only a few months earlier.

What Schonbohm discovered and recorded in a diary was almost incredible: plans to conquer West Germany's major cities; blueprints for a surprise attack on West Berlin through the city's subways and sewer systems; papers documenting the planned use of chemical weapons. But there were also the mundane problems of what to do with those 100,000 men whom the end of the Cold War had made superfluous.