Russia’s intensifying hybrid operations, including airspace violations, drone incursions, sabotage, and cyberattacks targeting NATO members, remain the dominant driver of trader assessments for another Article 4 consultation. Poland activated the mechanism in September 2025 after drone penetrations, while Romania and Lithuania faced similar incidents in 2026 without formal invocation, opting instead for North Atlantic Council discussions. Recent October 2026 events, such as a Lithuanian drone explosion and Black Sea strikes on shipping, have sustained attention on threshold questions. NATO leaders, including Secretary General Mark Rutte, continue to stress deliberate ambiguity around Article 5 while using Article 4 for consultations on sub-threshold threats. E5 defense ministers reaffirmed focus on these risks in late October, alongside ongoing defense planning talks that could shape responses through 2029.