In the post-imperial East Central Europe after the dissolution of the German, Austro-Hungarian, Ottoman and Russian empires, disappointment was commonplace. The imperial successor states were involved in revengeful animosities with neighbouring states, torn by their majority population’s hatred of domestic minorities, bereft of tens of millions of their co-nationals who had remained in now foreign nation-states, exposed to huge influxes of refugees, and embittered by the territorial concessions that they were forced to make. By contrast, the newly established nation-states were plagued by miserable social and economic conditions, poor infrastructures, unemployment, inflation, rigid and immobile social stratification, and corrupt and inefficient administrations. Such developments gave rise to huge and traumatic deportations and migrations of populations, which, paradoxically, simultaneously immensely increased the mobility of their imagination. Using the technique of ‘subversive mimicry’, these nationally indistinct elements established cross-national transborder communities as the zones of ‘national indifference’ within the new nation-states. Carried by the energy of their longing, these communities introduced imbalances, fissures, and divisions into the nation-state communities, which determined their belonging.