Russian drones crossing into Poland and MiG-31s violating Estonian airspace revived the core question: how does a Russia vs. NATO war actually begin? Moscow will keep probing seams—airspace, air defenses, political will—aiming to force NATO into an Article 4/5 dilemma. Europe’s fragmented defense industry, ammunition shortages, and uneven appetite for risk create openings for a rapid, deniable “fait accompli” in the Baltics using EW, drones, and covert forces. That scenario wouldn’t resemble a set-piece tank battle; it would be a shock campaign designed to split allies before they can mobilize.