Greenland: CFA is not a bad option

A goodwill gesture of handing over the territory of Greenland, at a reasonable tag, should not hurt

All this keeping the global bohomie in mind.  The least option could be a CFA - Compact of free association

The United States shoulders about two-thirds of NATO's total military spending—$967 billion out of $1.47 trillion alliance-wide in 2024—while the other 31 members combined mustered just $503 billion, less than what America spends alone. This stark dollar gap persists despite NATO's tiny common budgets of €3.5 billion yearly, where the U.S. pays only 16%, matching Germany's share.[1][2][3][4]

Even relative to GDP, America's 3.4% commitment outpaces most allies' 2% target (now met by 23 nations), but Poland's $31 billion (4.1% GDP) and the UK's $75 billion still pale beside the U.S. juggernaut that funds 68% of NATO's collective might.[5][6]

$USAR, $IPX, $IE, $VZLA, $CMP, $CTGO, $SSRM, $FSM, $NB, $PALAF

Compact of Free Association

Some have suggested a compromise could see Greenland forming something called a Compact of Free Association with the United States.
Professor Rothwell said a Compact of Free Association was one of a number of forms of legal and constitutional arrangements the US had with territories known as "insular areas".
"That's important because it needs to be noted that there are already existing models that could be applied under US law, of which one is the Compact of Free Association," he said.

Under Compacts of Free Association, the Federated States of Micronesia (FSM), Republic of the Marshall Islands (RMI), and Republic of Palau all have their own governments but the US has responsibility for their defence and foreign affairs.

Sources
[1] How much is each NATO country spending on its military in 2024? https://www.aljazeera.com/news/2024/7/11/how-much-does-each-nato-country-spend-in-2024
[2] Global military spending surges amid war, rising tensions https://www.sipri.org/media/press-release/2024/global-military-spending-surges-amid-war-rising-tensions-and-insecurity
[3] US contributes 16% of NATO annual budget, not two-thirds | Reuters https://www.reuters.com/fact-check/us-contributes-16-nato-annual-budget-not-two-thirds-2024-05-31/
[4] Funding NATO https://www.nato.int/en/what-we-do/introduction-to-nato/funding-nato
[5] NATO Spending by Country 2026 - World Population Review https://worldpopulationreview.com/country-rankings/nato-spending-by-country
[6] NATO defense spending by country 2025 - Statista https://www.statista.com/statistics/584088/defense-expenditures-of-nato-countries/