The U.S., Denmark, and Greenland reached a security deal. Here’s what to know.

This article was originally published on CFR.org and updated by NBC News.

After nearly two years of escalating rhetoric from Washington, the United States, Denmark, and Greenland signed a trilateral security agreement in September 2026 that allows for a greater U.S. military presence on the island—including the establishment of “Golden Dome” missile-defense capabilities. Despite President Donald Trump’s previous calls to acquire Greenland, the deal preserves the status quo, maintaining the island’s status as a semiautonomous territory of Denmark.

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Original source: https://www.nbcnews.com/world