NATO allies have maintained a stable security environment without any armed attack on member territory or forces that would meet the threshold for invoking Article 5, the collective defense clause. The July 2026 Ankara summit produced a joint declaration reaffirming an “ironclad commitment” to the provision amid ongoing Russian pressure on Ukraine and hybrid incidents such as drone incursions and airspace violations that fell short of triggering consultations or response obligations. U.S. force posture adjustments and spending debates have prompted alliance coordination rather than escalation, while intelligence assessments flag potential limited probes by Russia only over a multi-year horizon. With the resolution window closing at the end of 2026, the absence of qualifying military developments continues to underpin trader consensus on a low probability of invocation.