Poland responds to Russian drones incursion by invoking Article 4 of the NATO treaty − what happens next?
- Written by John Deni, Research Professor of Joint, Interagency, Intergovernmental, and Multinational Security Studies, US Army War College

NATO fighter jets shot down multiple Russian drones in Polish airspace on Sept. 10, 2025, sparking fears of an expanding Russia-Ukraine war.
The incident represented the first such incursion by unmanned Russian...