The top European Union military official, Robert Brieger, said it would make sense to station troops from EU countries in Greenland, according to an interview with Germany’s Welt am Sonntag published on Saturday, as U.S. President Donald Trump has expressed interest in acquiring the Danish territory.
If they invade Danish Airspace without permission, and refuse to leave, that would be probably necessary as a last resort
Bullies won’t back down until you show them resistance. (Like Turkey shooting down a Russian Plane invading their airspace)