The German Zeitenwende was supposed to be the pivotal moment for the defense and security reforms reflecting the new geopolitical realm in Europe. However, time gaps between the declared intentions and concrete actions raised doubts regarding Berlin’s readiness to be the EU’s driving force in the changing security landscape. The Zeitenwende moment can boost the European security sector reform. However, the lack of attention towards Central and Eastern European security concerns, strategic hesitation and the lack of cohesion between the EU member states leaves the EU vulnerable towards the new emerging risks and challenges. Sustainability and irreversibility of Zeitenwende process depends on Berlin’s ability to match short-term societal expectations and long-term strategic goals both at domestic and international level.