[Worldtraveler once upon a time]

---- "If Greenland is a self governing country can they simply sign a mutual defense treaty with the United States and Canada (hopefully Trudeau will be gone but he doesn't seem to go away)."

Those residents of Greenland will find themselves "encouraged" to make some decisions.

As to Denmark, its military can mount about two battalions in toto. This is going to be an interesting "NATO" issue over time, as two or more NATO nations will disagree.

:)

[PIF]

Military age = 18 for voluntary service
Conscription = Yes, for men and women.
Available for military service = 2,605,137, age 18–49 (2023)
Fit for military service = 2,107,794, age 18–49 (2023)
Reaching military age annually = 76,970 (2023)
Active personnel = 21,000 military & 4,638 civilian (2024)
Reserve personnel = 12,000 + 51,000 volunteers in the Home Guard
Deployed personnel = 800 (2024)

the military retains the capability to continually deploy 2,000 soldiers in international service or 5,000 over a short time span.

https://en.wikipedia.org/wiki/Danish_Defence