This chapter examimes the acute crisis of the world war and its role in destabilizing the political balance in both cities and in the overthrow of both the Habsburg Monarchy and the German Empire (as well as its constituent state, the Bavarian Monarchy). It compares the revolutions and counterrevolutions and the violence that accompanied the political struggles in both cities.

This chapter opens the third section of the book on the aftermath of the war. It addresses the end of the war and its many legacies. It starts with the armistice, and then considers the discussion about enemy aliens during the peace conference; it also explores the treaties that ended the war and their consequences for aliens, citizenship and property rights. It continues with the signing of all the final treaties, the emptying of the concentration camps and the lifting of the provisions on foreign movements, the agreement that regulated restitution or liquidation of assets, and the final exchange of populations. The chapter covers the period up to the late 1920s and deals with the transition from the state of emergency to peace, the resumption of naturalization procedures, new rules on borders and migration, new citizenship regimes that emerged from the war in both victorious and defeated countries as well as in the new successor states, and mass denaturalization and statelessness as a consequence of the emergence of new political regimes (such as the Soviet Union) or population exchange. It investigates the impact of special legislation on alien and enemy aliens on policies of migration control and explores the debate among jurists about the many violations of the conventions and human rights and the failed attempts at writing a new convention on enemy aliens.