I was looking at this article, 5 states that if you attack one or more of them in Europe or North America shall be considered an attack against them all. But it doesn’t state clearly if an ally attacks an ally, NATO will respond, so this is my speculation. I don’t think NATO can respond by military force, this attack on Greenland may fracture or cause inner chaos within the faction, and it could disband over this.
The world interpretation of Article 5 will be fascinating as this develops, but it also gets scary what happens if NATO disbands, or can it reform itself?
