NATO’s Article 5 collective-defense clause, which treats an armed attack on one ally as an attack on all, remains uninvoked except after 9/11, and trader consensus at 94.8% against activation before 2027 reflects sustained deterrence along the eastern flank. NATO’s July 2026 Ankara summit produced an agreed declaration reaffirming an “ironclad commitment” to Article 5 by all 32 members, including the United States, alongside pledges of continued support for Ukraine. U.S. intelligence assessments from early August indicate Russia may contemplate limited probes—cyber operations or small incursions targeting the Baltics or Poland—between fall 2026 and 2029 to test alliance resolve, yet land incursions are viewed as least probable precisely because they would trigger the clause. Forward deployments, regional defense plans, and European spending increases have reinforced posture without producing an incident meeting invocation thresholds. No other regional flashpoints have escalated to the level required for collective-defense activation within the narrow remaining window.