Trump’s Greenland idea isn’t new. The US has pursued it at least 3 times before

1867–1868: Early US interest after the Alaska purchase

After the U.S. bought Alaska from Russia, officials under Secretary of State William Seward discussed acquiring Greenland as part of a broader push into the Arctic.

1910: Proposed land swap involving Greenland

Under President William Howard Taft, American diplomats floated a complex land-exchange plan that would have transferred Greenland to the United States in return for concessions elsewhere. Denmark rejected the proposal, and it quickly collapsed.

1946: Formal post–World War II purchase offer

At the outset of the Cold War, President Harry Truman’s administration formally offered Denmark $100 million in gold to buy Greenland, citing its strategic importance. During World War II, a U.S.-built airfield on the island had served as a major refueling point for military planes en route to Europe.