One of the amusing aspects of Game of Thrones is that while constructing an intricately detailed timeline going back thousands of years, George RR Martin then leaves clues that the timeline may be off by thousands of years.
https://books.google.com/books?id=tYUsrknjhbEC&pg=PA46#v=one...
"Past a certain point, all the dates grow hazy and confused, and the clarity of history becomes the fog of legend." - Hoster Blackwood, to Jaime Lannister