The September 2026 trilateral security agreement between the United States, Denmark, and Greenland resolved prior tensions over Arctic basing rights by expanding U.S. access to sites including Narsarsuaq and Mestersvig while explicitly affirming Danish sovereignty and Greenland’s self-determination. This pact updates the 1951 defense framework, formalizes U.S. veto authority over non-NATO military presence or critical investments, and enables modernization at Pituffik Space Base alongside new missile defense elements. Both sides described the outcome as mutually beneficial for NATO Arctic posture against shared competitors. Danish intelligence assessments have flagged U.S. policy assertiveness as a broader risk factor, yet no active bilateral disputes or force deployments indicate escalation. NATO treaty obligations and aligned strategic interests in countering external influence further anchor trader expectations against any clash before 2027. Late shifts could stem from abrupt policy reversals, Greenland independence moves outside NATO frameworks, or unforeseen incidents, though the recent accord substantially lowered such probabilities.