Still, coincidentally, the last foreign territory purchased by the United States was from Denmark. It bought the Virgin Islands in 1917 for $25 million. A few subsequent U.S. territorial expansions in the South Pacific were the result of annexations and treaties, according to the Global Policy Forum, a watchdog.

Canadian leaders reportedly plan Greenland visit in February amid growing international tensions over President Donald Trump's annexation comments.

A new political theory suggests that what motivates this president is something far older than great power rivalry.

Ariz., introduced new legislation to block President Donald Trump from invading Greenland after threats of military action.

12/24/2024 — The potential acquisition is lumped into a grander scheme to expand U.S. borders, in which Trump would aim to transform Canada and Greenland into American states. 1/7/2025 — Trump suggests that he would use military force to obtain Greenland, and economic force to squash Canada.

Donald Trump annexing Greenland would not only cause geopolitical chaos but also a major headache for the monarchy.

One of President Trump's closest aides questioned Denmark's claim on Greenland and suggested the U.S. could seize it without pushback.