United States, Denmark, and Greenland agree to U.S. permanent control of Greenland's security

On September 18, 2026, President Donald Trump announced that the United States, Denmark, and Greenland had reached an agreement granting the U.S. permanent control over Greenland's security. The agreement, which has no expiry date, allows the U.S. to develop a large military presence on the island and prohibits U.S. adversaries from establishing bases or making sensitive investments without U.S. approval. The announcement follows Trump's long-standing interest in acquiring Greenland, which he has pursued for national security reasons. However, the deal has faced opposition from Greenlanders and European allies who emphasize Greenland's sovereignty.