The United States, Denmark and Greenland have reached an agreement to expand Washington’s military presence on the Arctic island and block US adversaries from establishing bases there, US President Donald Trump announced on Friday.

Trump said the deal would give the US permanent access to Greenland for defence and security purposes. It would also restrict sensitive investments by countries considered US adversaries without US approval. “At my direction, we worked with representatives of Denmark and Greenland to guarantee that the United States will FOREVER have the complete ability to do what is necessary in Greenland to secure and defend the security of Greenland, and the United States of America,” Trump wrote on Truth Social.

Trump said the US would soon announce a large military presence on Greenland. The island already hosts a US Space Force base in the northwest. “This is a dream come true for the United States of America,” Trump wrote.

The Danish prime minister’s office said the agreement would strengthen security in the North Atlantic and Arctic regions. US Secretary of State Marco Rubio said the deal permanently addressed Washington’s security concerns. “Greenland will forever be part of the strategic defence area of North America and exclude any adversary from it and the surrounding area,” Rubio said.

A State Department official said the agreement would prevent non-NATO countries from establishing military bases in Greenland. It would also allow only the US and its allies to make certain unspecified “sensitive investments” on the island.

The deal would give the US permanent access, basing and overflight rights. These provisions would remain valid even if Greenland becomes independent from Denmark. The exact details remain unclear, including whether Washington will build additional bases. The US already has extensive rights under a 1951 treaty.

Greenland is an autonomous territory of Denmark, and its residents have expressed aspirations for independence. The island has also faced political opposition to greater US influence.