Thule Airforce Base (Pituffik Space Base):
Justa: "I still think one Marine BCT with naval support could take it within 3 days"
The US Airforce has maintained Thule Air Base (now renamed Pituffik Space Base) in northwest Greenland since 1943.
The US Sondrestrom Air Base in west-central Greenland was operational from 1941 to 1992.
Any invasion force would have to fight off the Danish navy -- about 74 vessels of all sizes and types, the largest of which are 9 relatively modern frigates.
They all have the advantage of being designed for arctic conditions.
Danish navy frigate & landing craft:
There are no other military forces in Greenland, so yes, your child's elementary school class could land on Greenland and take it over, provided they are prepared to deal with some 50,000 Inuits:
