President Donald Trump signed a new security agreement with Denmark and Greenland Tuesday that expands the U.S. military presence on the strategically important Arctic island while keeping Greenland under Danish sovereignty. The deal allows the United States to establish two additional military sites in Greenland and expand existing defense operations.

The two sites are Narsarsuaq in southern Greenland, where the U.S. previously operated the Cold War-era Bluie West One base, and Mestersvig on the island’s eastern coast, which is currently used by Denmark’s Sirius Dog Sled Patrol. The United States already operates Pituffik Space Base in northwestern Greenland.

Trump said before the agreement was signed that it gives the United States “permanent control over security” in Greenland and prevents U.S. adversaries from establishing military facilities or making sensitive investments on the island without American approval. The agreement also allows the United States to expand missile-defense capabilities in Greenland.

Denmark and Greenland have emphasized that the agreement does not transfer sovereignty. Greenland remains a self-governing territory within the Kingdom of Denmark, and Danish officials said the deal respects Greenland’s right to self-determination. The agreement also places Arctic security within a broader NATO framework.

The agreement follows months of tensions over Trump’s push to acquire Greenland, including earlier statements that left open the possibility of using military or economic pressure. The new pact expands the U.S. military footprint without making Greenland U.S. territory and is intended to strengthen defense cooperation in the Arctic and North Atlantic.