Another theme very much in my wheelhouse, nailed it with 9,914, although I did hesitate a bit on Q4 because I wasn't sure how long the Abbasid Caliphate lasted
I genuinely don't believe that anyone got 10/10 on their first try without help. Man on the Moon in '69? Certainly. Getting 10/10 on this quiz. Not a chance.
You underestimate the people who use this site. As a history nerd, I didn't have much trouble. The only questions that gave me pause were four & five, and I still answered those relatively quickly after a bit of consideration.
Knowing 6-8 is often not that big of an achievement (sometimes it is "knowing" because there is no way any of the other options are right) and then getting lucky with the other ones is not that farfetched.
With time bonus, your score is 9,858
(Although I came down to a 50-50 chance by eliminating Aztec and Russian Empire.)
Turns out my years of being a history nerd have finally paid dividends