U.S. is the de facto authority, even if they don't technically own the land

U.S. takes Denmark, therefore also takes Greenland

<10km of Greenlandic territory controlled by US by EOY

Frederik X, King of Denmark is abducted by the US and abdicates the throne, ceding all rights and titles to Donald Trump

Trying to invade with lots of troops but without a clear solution other than claiming to lead the government.

Trump will say that he took control over Greenland, but Denmark will say no. As usual, Fox News will give airtime only to Trump’s speech.

Putin will take it for Russia and sell it to Donald J Trump

Trump promises each Greenlander X$, so they have a vote to secede from Denmark and join the US. Vote is successful 

Imposition of tariffs on any country that opposes

USA does not control whole of Greenland by EOY

U.S. citizens will vote to join Denmark, making the United States part of Danish territory and administratively linked to Greenland

Creator judgement. CCR. Can be part of Greenland (not necessarily the whole thing.)

You can suggest answers that I will add to the market if they are non-conflicting. I will resolve the two currently conflicting options to 50% each in case both are true. This criteria is non-negotiable.