This panel analyses the external security challenges the EU faces in its South-Eastern Neighbourhood. The panel focuses on the developments in the Eastern and South-Eastern periphery of the EU, which has witnessed Russia emerging as a renewed security threat and the development of a mounting migration challenge as a result of the instability in the Southern neighbourhood following the events of the Arab Spring. The papers analyse how the EU's Central-Eastern European region deals with these challenges and to what extent this has resulted in a new core-periphery divide between the CEE region and German-led EU 'mainstream'.