At the height of their power the Mongols invade Alaska and find a whole lot of nothing, dont make it through winter impact
a winter impact?
if you're going to strike the Mongols with an asteroid, wouldn't it be easier to have it hit Mongolia? (or was there really an asteroid hitting 13th/14th century Alaska in OTL?)
I think it's "don't make it through winter intact"
At the height of their power the Mongols invade Alaska and find a whole lot of nothing, dont make it through winter impact