Group 1 - The EU is investing billions of euros to establish a "drone wall" using technologies tested in Ukraine, following recent incursions by Russian drones into NATO airspace [1][2] - EU Commission President Ursula von der Leyen emphasized the need for a unified European capability to respond in real-time, supported by a €6 billion fund to create a "drone alliance" with Ukraine [2][3] - Eastern EU countries, including Poland and the Baltic states, are planning to strengthen their borders, but officials stress the importance of a coordinated approach based on integrated technology [2][3] Group 2 - NATO has launched the "Eastern Sentry" air defense mission, deploying aircraft, ships, and reconnaissance systems along its eastern flank to address the growing threat from drones [3] - Ukrainian innovations in air defense have provided cost-effective solutions to counter Russian drone attacks, despite reliance on Western partners for missile systems [3][4] - The development of acoustic sensor systems by Ukrainian tech companies allows for the detection of small, low-flying drones, enabling more affordable interception methods [4] Group 3 - The concept of drone warfare is transforming modern armed conflict, necessitating the development of new countermeasures, particularly against unmanned systems [5]