The US already has the right to place military installations across Greenland.

True: the treaties in force as of January 2026 (the 1951 US–Denmark Defense of Greenland Agreement as amended in 2004, plus related arrangements) give the US broad rights to establish and operate military installations in Greenland, beyond a single base. Mostly true: the US has substantial treaty rights to set up defense areas or installations, but these need Danish/Greenlandic agreement or consultation, which the claim slightly overstates. Mixed: the treaty allows more defense areas only with Danish agreement, making 'already has the right' substantially overstated though not baseless. Mostly false: US rights are limited to existing agreed defense areas (e.g., Pituffik), and new installations need fresh agreement. False: the US has no treaty right to military installations in Greenland. The hedged second part (ICBM interception) is not the core test.

Set before the research began.

1. E1 DEFENSE Greenland (Treaties and Other International Acts Series 04-806) US Department of State · 19 August 2026

   “Thule Air Base is the only defense area in Greenland. The provisions of Article II of the Defense Agreement shall apply to the establishment of new defense areas.”

2. E2 Avalon Project: Defense of Greenland Agreement (1951) Yale Law School Lillian Goldman Law Library, Avalon Project · 1 January 2008

   “by establishing and/or operating such defense areas as the two Governments, on the basis of NATO defense plans, may from time to time agree to be necessary for the development of the defense of Greenland”

3. E3 Greenland, Denmark, and US Relations Congressional Research Service · 17 January 2026

   “today, it maintains one base in Greenland, the Space Force-operated Pituffik Space Base, which supports missile warning, missile defense, and space surveillance missions.”

4. E4 If Trump's 'framework' Greenland agreement relies on creating 'sovereign' bases, it would bring long-term legal issues Chatham House · 23 January 2026

   “This might be extended to more than one base, in accordance with the 1951 Defense of Greenland Agreement, as amended in 2004.”

The 1951 agreement as amended in 2004 states that Thule (Pituffik) Air Base is the only defense area in Greenland, and that new defense areas are governed by Article II (E1). Article II provides for defense areas that "the two Governments… may from time to time agree" to be necessary (E2). CRS confirms the US maintains one base, Pituffik (E3), and Chatham House notes this could be extended to more than one base under the agreement (E4). So the treaty does allow more installations, but only with Danish agreement. That makes the claim that the US "already has the right" to dot Greenland with installations a substantial overstatement, though it is not baseless.