Greenland tensions and NATO defence supply chains

Beyond sanctions, what military problems could Europe and the United States face in a severe dispute over Greenland?

Both sides would suffer from breaking tightly integrated defence supply chains whose vulnerabilities have not been adequately stress-tested.

In the January 2026 discussion, the answer argues that even nominally national weapon systems contain parts and expertise from multiple NATO countries. A forced break in those connections would therefore disrupt every participant. It also questions whether defence supply chains have been adequately tested for such a rupture, warning that some dependencies would become apparent only after supplies stopped.