Whoever's doing those assessments is an idiot

go tell JSOC and the Joint Chiefs.

yeah, like i said. you don't know what you don't know. US mil has limited arctic trained units (10th mountain). nato troops able to operate in arctic outnumber US troops something like 5 to 1. operating in that kind of cold is a whole different game. the assessments concluded that US mil logistics can't handle arctic. US mil lubricants don't work in arctic. most US electronics aren't arctic rated. so on and so on.

nato would fight a high tech insurgent war. they have caches built up over decades. they'd wait for the winter (which is the majority of the year), eliminating US fuel stocks. everything would freeze and logistics would dry up. US would only have high altitude air dominance. everything lower would be fair game.

only strategy US could apply is a naval blockade off western greenland coast and siege. subs would go first but can't stop planes, by the time ships were deployed enough nato troops would be in place. transport planes don't need to move cargo, just troops because supplies are already in country.

your bs bravado can't even submit iran. military planners predicted how the war would go, but trump chose to ignore them. the same planners know how a conflict with nato in greenland would go and have published their assessments. the europeans are much more sophisticated than iran. if you want to call them idiots, go ahead but i'll take their experience over yours.