In the context of the Russian war of aggression against Ukraine, security perceptions and discourses in Europe have changed considerably. The thematic line In:Security in Eastern Europe intends to address different aspects of security and insecurity, relying on critical/vernacular security studies as a theoretical prism. This implies going beyond conventional state-/military-centred notions of security. Instead, the focus will shift to regional/local security demands and needs. The aim is to shed light on how the Russian war and global security developments are perceived and have particular consequences at those levels – in a deliberate decentring of the idea of a European security order.