New Delhi, Jan. 13 -- Tensions between the United States, Denmark and Greenland have escalated. US Special Envoy to Greenland Jeff Landry accused Denmark of "reoccupying" Greenland after World War II by "ignoring UN protocol," reviving a historical argument as Washington weighs its options over the Arctic island.

Landry, the Governor of Louisiana appointed by US President Donald Trump as special envoy, stressed that history must inform current debates over Greenland's future.

Writing on X, formerly Twitter, Landry said the United States protected Greenland's sovereignty when Denmark could not.

"History matters. The U.S. defended Greenland's sovereignty during WWII when Denmark couldn't. After the war, Denmark re-occupied it-side steppi...