Since the annexation of the #Krim in 2014, it has been clear that Putin is pursuing the change of borders and the status quo by force of arms. Military historian Prof. Dr. Sönke Neitzel from the Universität Potsdam explains why the Russian war of aggression against Ukraine is also about the major strategic issues of the 21st century and why politicians must now show the will to act. While politicians speak of #Zeitenwende, #Neitzel makes it clear that Germany must prove its ability to reform in order to avert a failure of the declared turning point. Is German politics capable of engaging in strategic debates and are we prepared to reform ourselves?