On September 19, 2026, US Secretary of State Marco Rubio announced that Denmark has accepted a security agreement with the United States concerning Greenland. The decision stems from Denmark's inability to financially secure the island against potential attacks or threats. According to Rubio, the US is well-equipped to handle this responsibility.

The new agreement addresses security concerns for both the US and Denmark, as well as Greenland itself. Negotiations between the US, Denmark, and Greenland have been ongoing since February, involving high-ranking officials from both sides.

Previously, former President Donald Trump indicated that a security deal had been reached among Washington, Copenhagen, and Nuuk, granting the US long-term control over security and related needs on the island. The agreement is expected to allow the US access to, and use of, Greenland's airspace, as well as the construction of additional military facilities as necessary.

Moreover, the deal aims to prevent non-NATO countries from establishing military bases or maintaining military forces in Greenland and restricts investments in sensitive sectors. However, it is important to note that this agreement does not transfer sovereignty of Greenland to the US; the island remains part of the Kingdom of Denmark, and the people of Greenland retain their right to self-determination.

A joint statement from Denmark and Greenland indicated that the agreement still requires formal signing and necessary approval procedures before it can take effect.

The US has maintained a military presence in Greenland, including the Pituffik space base located in the northern part of the island. The strategic location of Greenland in the Arctic has long been considered vital for defense and monitoring military activities in the region.