Pls see 24.
It would make for a good novel, and I’d love it if you’d do one. That said, have you read Jared Diamond’s book collapse? It has a good chapter on Greenland, and why the Norse colony there likely was ultimately unsustainable.
Long supply lines can be fatal.
It isn’t enough to establish a beach head—or even conquer everything in site.
For the Norse, taking Mexico City would likely resemble Napoleon taking Moscow.
Or a guy getting a good looking crazy woman to marry him.