

Not really either. While greenland and the others are highly autonomous and practically their own countries, national security is not in their competence but instead the job of the kingdom. Not like NATO where every country has their own military and has to help each other but as a federation where there is only one military.
Niels Anderson does a way better Job than me explaining it:
which is, incidentally, 1.5 times as long as the maximum in switzerland.
Although terrorists like him will never be able to be released and will be instead held in “protective arrest”