I'm trying to identify a short story I read within the last two years about aliens who invade Earth while the Cold War is occurring.
They are baffled by the strange white stuff that falls from the sky and freezes them, the moving winds in the tropics that destroy their bases and other aspects of climate.
The aliens focus their attack on the United States, but all Earth unites to fight them off, being ultimately unsuccessful.
The aliens build their base on an uninhabited island to sign a treaty with Earth, where it is agreed that Martians will inhabit the Earth for the six months each year where it's not snow season or hurricane season.
It is revealed at the very end that the uninhabited island the aliens have built their base on is
The story is told primarily from the alien war general's point of view, and may have been a Baen story.
(Even though I read it in the last two years, I got the impression that it was a lot older - publish date probably sometime in the last millenium).