Hybrid threats blur the line between war and peace. Rivals sabotage undersea cables and stage airspace incursions. They launch cyberattacks, meddle in elections, and spread disinformation. They also run espionage networks and carry out assassinations on Western soil. These moves pressure open societies but stay below the line of open war. This hub tracks the gray-zone warfare aimed at Europe and North America. Airspace incursions into NATO skies are a growing worry. Baltic Sea security has become a front line for undersea cables and pipelines. Critical infrastructure attacks target power, water, and transport. Espionage, sabotage, and assassinations extend the same playbook. Russian hybrid warfare fuses cyber, information, and economic tools. This hub follows Russian hybrid warfare and how the Kremlin probes Western nerve. Critical infrastructure attacks test how fast states can respond. Baltic Sea security and airspace incursions sit at the center of the alliance’s risks. Fellows and analysts show how governments can spot and deter gray-zone warfare, from espionage and sabotage to assassinations. Explore analysis and commentary on hybrid threats, from Baltic Sea security to the defense of daily life.