Oh, dear. I'd really like to play here, but I have some more conspiracies for you. The calendar as we know it is a fiction.
The "Intermediate periods" in Egypt aren't nearly so long. The "Bronze Age Collapse" didn't happen. The dark ages didn't happen. It's phantom time and historians try to fill it with events that properly belong somewhere else.
The Greeks didn't forget how to write for 300 years and then rediscover it with a new alphabet. The Anglo Saxons in England didn't forget how to use money for 300 years and then rediscover coinage in the Viking Age. The Saxons are the Vikings but there are about 300 years of extra time in there.
There are some interesting Viking connections though. They took over North Africa and Spain in the late Roman Empire.
Ramesses II was from a military family. His mummy appears to have red hair. They came from Lower Egypt (next to the Mediterranean) rather than Upper Egypt like the native Egyptian dynasties. The people of Lower Egypt were mixed canaanite and other. The military families might have been an early people like the Vikings - originally hired as mercenaries, just like the Byzantines hired the Vikings centuries later.