NUUK — Greenland's parliament, Inatsisartut, approved a trilateral security agreement with Denmark and the United States on November 3, 2026. The vote in Nuuk was 16 in favour, none against and seven abstentions.

The U.S. State Department welcomed the approval on November 4, with spokesperson Tommy Pigott calling it a "massive win" for NATO and U.S. national security.

U.S. President Donald Trump, Danish Prime Minister Mette Frederiksen and Greenlandic Prime Minister Jens-Frederik Nielsen signed the pact on September 22, 2026, on the sidelines of the United Nations General Assembly in New York. It provides for a stronger U.S. military presence, modernisation of Pituffik Space Base and additional defence areas at Narsarsuaq and Mestersvig. It also advances plans for Trump's proposed Golden Dome Missile Defense System.

The agreement reaffirms Denmark's sovereignty over Greenland and the Greenlandic people's right to self-determination. It would remain applicable if Greenland became independent, with Greenland required to remain in NATO. The pact is intended to ease tensions following Trump's repeated calls for Greenland to become part of the United States.

Danish lawmakers are scheduled to hold a first reading on November 11 and a final vote on November 19, 2026. The pact will enter into force only after Denmark completes its parliamentary process.

Pituffik Space Base's 1951 defence arrangement gives the United States exclusive jurisdiction over its facilities; Denmark and Greenland have flag and liaison provisions.