NATO’s consistent handling of recent eastern flank incidents through Article 4 consultations rather than collective defense activation underpins trader expectations that the clause will remain uninvoked before 2027. September 2025 Russian drone incursions into Poland and airspace violations over Estonia prompted enhanced air policing and Operation Eastern Sentry without crossing the armed-attack threshold requiring unanimous ally consensus. Ongoing support for Ukraine, a non-member, has stayed below that bar, while March 2026 statements from NATO leadership explicitly ruled out Article 5 in response to a missile incident near Turkey. Warnings from alliance military figures point to potential Russian tests of NATO territory as early as 2027–2029, yet current deterrence measures, forward deployments, and diplomatic channels continue to contain friction without triggering the high bar for invocation.