Introduction: A New bipolarisation of Europe.- The NATO Post-Cold War Enlargement: Realist and Neorealist Approaches.- From Hamburg and Munich to Tallinn and Burgas.- From the War Against Georgia to the Annexation of the Crimea and the Following Increase of Military Tension.- The Growing Militarisation of the Baltic and Black Sea Areas After the End of the Cold War.- American Military Doctrines of the New Generation.- Conclusion: Waiting for a New Gorbachev and for a New Reagan.