Just for the record…, wiki say… (my bold)
In the Treaty of the Danish West Indies, signed in 1916, the US government purchased a group of Caribbean islands (now known as the United States Virgin Islands) from Denmark, and explicitly recognised Danish sovereignty over all of Greenland. Denmark declared full sovereignty over all of Greenland in 1921, in the aftermath of the Treaty of Versailles.[29] In 1933, Norway, which had occupied part of Eastern Greenland up until then, accepted a ruling of the Permanent Court of International Justice and renounced its claim.
The 1953 Constitution of Denmark ended Greenland’s status as a colony, integrating it fully into the Danish state as a regular county, as part of decolonization efforts and with the consent of the Greenland Provincial Council.[29] In the 1979 Greenlandic home rule referendum, Denmark granted home rule to Greenland, leading to the establishment of a local government authority with responsibility for local matters, but Greenland remains part of the Kingdom of Denmark, with the central government in Copenhagen solely responsible for defence and foreign policy. In 2009, Greenland was recognised under international law as a People entitled to external self-determination.[29]
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Denmark is one of the twelve original founding member states of NATO and signed the Greenland Defense Agreement with the US in 1951, allowing the US military to operate in Greenland with Danish consent under a NATO framework.[30] In that agreement, the US unambiguously recognized the sovereignty of the Kingdom of Denmark over all of Greenland
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ratification
The treaty was signed on 4 August 1916, at the Biltmore Hotel in New York City, by Danish Minister Constantin Brun and Secretary of State Robert Lansing.[23] The U.S. Senate approved the treaty on 7 September 1916. A Danish referendum was held on 14 December 1916, and on 22 December the Rigsdagen (the Danish parliament) ratified the treaty.[24] U.S. President Woodrow Wilson ratified the treaty on 16 January 1917. Ratifications of the treaty were formally exchanged in Washington, D.C., on 17 January 1917. On 25 January, President Wilson issued a proclamation on the treaty, and on 9 March, King Christian X of Denmark also issued a proclamation.
and so forth…https://en.wikipedia.org/wiki/Greenland_crisis
