President Donald Trump said Friday that the U.S. has reached an agreement for “permanent control over security” for Greenland that would enable a broad expansion of the American military presence on the territory of Denmark that he has long coveted.

The White House did not release a draft of the agreement, which is expected to be signed by all three parties at the U.N. General Assembly next week. It would apparently replace a 1951 treaty that granted the U.S. authority to station troops in Greenland.

The agreement would bar non-NATO nations from establishing a military base or having a troop presence on the island — and would prohibit investments by non-allies in the critical minerals and mining sectors, according to the State Department.

Those provisions appear designed to block China from doing business or establishing a military footprint in Greenland, while leaving room to note there is no public indication Russia plans any such move to the island, according to a NATO official who spoke on background.

Trump said on social media that the U.S. will have “the complete ability to do what is necessary in Greenland in order to secure and defend the security of Greenland, and the United States of America.”

There is no indication that the new agreement grants the U.S. any sovereignty over any part of Greenland, and it does not transfer property or territory to the U.S.

Danish Prime Minister Mette Frederiksen and Greenlandic Prime Minister Jens-Frederik Nielsen confirmed the agreement in a joint statement.

Frederiksen said the agreement will strengthen the security of the Arctic and the North Atlantic, and recognizes “the sovereignty and territorial integrity of the Kingdom and the Greenlandic people’s right to self-determination.”

Nielsen added that the deal reflects “Greenland’s interests and its place in the international cooperation. It is to the benefit of us all.”

A 1951 agreement between the U.S. and Denmark already gave Washington wide latitude to expand military bases and deploy troops to the island, something NATO diplomats have pointed out with some frustration since the start of the Trump administration. It is not clear how much new authority this agreement grants beyond what the earlier treaty already allowed.

While the U.S. military footprint in Greenland is small, it has fluctuated in size depending on the threat picture throughout the Cold War and after. American warships can dock at a deepwater port there and radar systems feed data back to the Pentagon.

In a related shift, U.S. defense planning has increasingly put Greenland under North American-focused command structures, reflecting how Washington prioritizes security in the North Atlantic. That change affects how Greenland figures in planning at the Pentagon and the White House.

The United States, Greenland and Denmark have been negotiating for months about U.S. requests for more access to Greenland. President Trump’s push for greater American presence on the island has raised concerns among some in Europe, though many recognize the strategic need to keep critical Arctic infrastructure and minerals secure from hostile commercial influence.

For Greenland and Denmark, the agreement is being presented as a way to balance stronger security ties with allies while protecting Greenlandic sovereignty and economic interests. For the U.S., it secures a forward position in the Arctic at a time of growing competition over resources and shipping lanes.