President-elect Donald Trump’s eldest son, Donald Trump Jr., arrived in Greenland Tuesday for a personal visit as Trump has renewed his suggestion in recent weeks that the Danish territory should become part of the U.S.—one of several controversial territorial takeovers Trump has floated, citing national security.

Trump has floated buying the island for years. Trump wrote on Truth Social last month the U.S. should take control of Greenland “for purposes of National security and Freedom.” He also floated the idea in 2019, telling reporters, “strategically it’s interesting” and calling the theoretical acquisition “essentially . . . a large real estate deal.” The Danish territory is home to the Pituffik Space Base and has become increasingly important on a geopolitical scale in recent years as ice in the Arctic Circle has melted and opened new North Atlantic shipping lanes, drawing interest from Russia and China. Trump also claimed in 2019 Greenland is “hurting Denmark very badly because they’re losing almost $700 million a year carrying it,” referring to Denmark’s financial assistance to Greenland.

Greenland is thought to be home to a wealth of untapped mineral resources, including coal, zinc, copper, iron ore, diamonds and oil, though only small portions of the island have been explored, in part due to its harsh conditions as it’s predominantly covered by ice and glaciers.

Greenland is part of Denmark. The country’s links to the island—home to fewer than 60,000 people, most of whom are Inuit—stretch back centuries: Norse settlers arrived in the territory over a millennium ago before eventually disappearing, and Denmark began colonizing the island in the 1700s. Greenland now has representatives in the Danish parliament, and its local government has gained more autonomy to handle internal affairs in recent decades, though Denmark still controls its foreign relations. In recent years, a push for full independence has grown more prominent.

Government leaders in Greenland and Denmark have rebuffed Trump’s suggestions and said the island isn’t for sale. Greenland’s Prime Minister Múte Egede said last month, “Greenland is ours. We are not for sale and will never be for sale. We must not lose our long struggle for freedom.” Danish King Frederik also changed the royal coat of arms earlier this month to more prominently feature a polar bear, representing Greenland, and a ram, representing the Faroe Islands—leading to some interpretations that the move was a subliminal message to Trump, though Greenland and Denmark have experienced heightened tensions in recent years as Greenland’s government has called for independence. The Danish royal household did not address suggestions that the changes were made in response to Trump, but said in a statement the three crowns symbolizing the union of Denmark, Norway and Sweden were replaced by the ram and polar bear because they were “no longer relevant,” The Guardian reported. Leaders also strongly dismissed the idea of selling Greenland to the U.S. when Trump first floated it in 2019. Danish Prime Minister Mette Frederiksen called it “an absurd discussion” at the time, and said, “I strongly hope that this is not meant seriously.” The comments prompted a public feud with Trump, who cancelled a planned visit to Denmark over Frederiksen’s comments, which he called “nasty” and “inappropriate.”

Trump has also threatened to demand repossession of the Panama Canal, and facetiously suggested the U.S. should take ownership of Canada. Trump referred to Canada as “the 51st state” in a Truth Social post Monday after Prime Minister Justin Trudeau announced his plans to step down. Trump’s threat in November to impose a 25% tariff on Canada and Mexico has riled Canadian leaders, dividing Trudeau and his allies. Trump said Canada would “be TOTALLY SECURE from the threat of the Russian and Chinese Ships that are constantly surrounding them” if it joined the U.S. Some Canadian politicians have dismissed the suggestion, with Ontario Premier Doug Ford jokingly suggesting Canada should buy Minnesota and Alaska. More seriously, Trump also said last month he would demand “Panama Canal be returned to us, in full, quickly and without question,” unless the Panamanian government met its “moral and legal” requirements,” reiterating his complaints that Panama charges the U.S. “highly unfair” fees for ships passing through the canal. The U.S. built the canal in the 20th century and maintained control of the territory surrounding it for decades, before transferring it to Panama starting in the 1970s. Panamanian President José Raúl Mulino dismissed the suggestion of ceding the canal in a video message, saying: “Every square meter of the Panama Canal and its adjacent area belong to PANAMA, and will continue to be.” Trump responded on Truth Social: “We’ll see about that,” and posted a photo of the U.S. flag over the canal with the text “Welcome to the United States Canal!”

Former President Harry Truman offered Denmark $100 million in gold in 1946 to buy Greenland amid heightened tensions between the U.S. and Soviet Union. Greenland sat between the two countries and was viewed as a potential battleground. The offer was “seen as a bit of an insult” to the Danish government, Florida State University professor Ronald Doel told The Washington Post.

The Way For President Trump To Get Greenland (Forbes)

Trump Says Canada Should Merge With U.S.—Trolling Trudeau As He Steps Down (Forbes)

Trump Says US Should Take Ownership Of Greenland And Threatens Panama Canal Takeover (Forbes)