“Did President Trump secure permanent U.S. military control over Greenland at no cost, without an invasion, through an agreement that would remain in effect even if Greenland becomes independent?”

On September 18, 2026, President Donald Trump announced an agreement between the United States, Denmark, and Greenland. The agreement, which follows months of negotiations, allows for an expanded U.S. military presence in Greenland and establishes that the U.S. will have 'permanent control over security' regarding the exclusion of foreign adversaries (specifically China and Russia) from establishing bases or making sensitive investments in the territory.

Key points of the agreement include:

1. Security Control: The deal prohibits non-NATO bases and restricts foreign adversaries from sensitive investments, effectively granting the U.S. a permanent security veto in the region.
2. Military Presence: The U.S. is authorized to increase its military footprint beyond the existing Pituffik Space Base.
3. Sovereignty: Contrary to earlier rhetoric regarding the purchase or annexation of Greenland, the agreement explicitly recognizes the sovereignty and territorial integrity of Denmark and the right of Greenlanders to self-determination.
4. Cost: President Trump stated there would be 'no cost' to the U.S., though the long-term financial implications of expanding military infrastructure are not fully detailed in the initial announcement.
5. Ratification: The agreement requires formal signing and parliamentary approval from both the Danish and Greenlandic governments, meaning it is not yet fully finalized as of the announcement date.