North Atlantic Treaty Organization

Description

North Atlantic Treaty Organization; the U.S. led military alliance whose members include Denmark and Canada, both targeted by Trump annexation threats

Background

The North Atlantic Treaty Organization (NATO) is a collective-defense military alliance founded in 1949 that links the United States with Canada and much of Europe. In 2025, Donald Trump declined to rule out using military force to seize Greenland, a territory of fellow NATO member Denmark, and to annex Canada, also a NATO member, prompting legal scholars to note that threatening force against allies runs counter to the alliance’s founding principles.

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