A 1,100-Year-Old Viking Sword

In 2017, reindeer hunters on a mountain in southern Norway discovered a Viking sword made of high-quality iron. Archaeologists believe the high altitude (5,381 ft above sea level) and the mountain’s cold, dry conditions helped preserve the sword. They also think the sword may have been lost over 1,100 years ago by a Viking journeying through the rough terrain during a blizzard.
I'm wondering, if s/o writes:
"Faaaake - how can it be?
The US exist since 1776-07-04 ! Nothing can be before!
Don't be a woke leftist, do your own research, touch some grass and never trust science or the universities!"
Bomb! What the fuck?