President Donald Trump signed a trilateral agreement with Denmark and Greenland on Tuesday

Aspen —President Donald Trump signed a trilateral agreement with Denmark and Greenland on Tuesday. The deal secures a larger U.S. military footprint in the Arctic while keeping the island under Danish sovereignty.

The signing took place in New York on the sidelines of the U.N. General Assembly. It follows days of speculation after Trump first teased the arrangement. The core of the deal allows the U.S. to build two major new military bases in Greenland. Currently, the American presence is limited to roughly 200 personnel at the Pituffik Space Base in the northwest. That base handles missile warning and space surveillance for both Washington and NATO.

This shift reverses decades of downsizing. Since 1945, the U.S. has retreated from thousands of troops on 17 installations to the current minimal garrison. The new agreement effectively locks in that expansion. It also includes a provision ensuring the deal remains valid even if Greenland votes for full independence from Copenhagen in the future.

Tensions had been high for months. Trump threatened to simply seize the territory from his NATO ally, Denmark. Danish Prime Minister Mette Frederiksen warned that such a move would mark the end of the Atlantic alliance. The standoff unsettled the roughly 56,000 residents of the island and drove a wedge between the U.S. and its European partners.

Trump framed the move as a security necessity against rivals. He stated that the U.S. would immediately begin developing a large military presence in appropriate locations. “This is tremendous for Europe and for the United States and for everybody,” he said just before signing. “And for Greenland, it’s going to be incredible.”

What is notably absent from the final text is a definitive answer on ownership. Trump has long desired to acquire the mineral-rich island. As recently as 2019, he pushed for a purchase. During his second term, he issued threats to take it by force if negotiations failed. On Tuesday, however, he did not respond to questions about whether a formal U.S. acquisition of Greenland is still on the table. He previously insisted the U.S. needed to “take Greenland” to prevent Russia or China from doing so. Though he said he would rather “make a deal” for the territory, he added, “one way or the other, we’re going to have Greenland.”

The economic stakes are real. About two-thirds of Greenland’s territory sits inside the Arctic Circle. Melting sea ice has opened additional shipping routes, increasing the strategic value of the location. Trade dynamics and resource extraction hopes have factored into local concerns about the island’s future trajectory.

Denmark’s parliament approved a bill last year to allow U.S. military bases on Danish soil. This widened a 2023 agreement made with the Biden administration that gave U.S. troops broad access to air bases in Denmark. The new Trump-era deal builds on that legal foundation but scales up the operational commitment significantly.

For locals in the valley, the immediate impact is indirect but tangible through federal defense spending flows. The agreement stabilizes a potential diplomatic rupture that could have disrupted broader NATO logistics. It buys time for infrastructure development in the Arctic while maintaining the status quo on political control.

The short version: The U.S. gets the bases. Denmark keeps the flag. Greenland gets the investment. And Trump gets his win without having to annex a country mid-crisis. Whether that satisfies his original ambition remains the open question.