My brother had a HS history which claimed Mohammed had one wife - and it wasn’t the 9 year old.
In 9th grade ( history geek that I am ) I discovered my history book mistakenly claimed aircraft carrier US Bunker Hill was at Pearl Harbor.
I shudder to think what the “history” textbooks teach about the foundation of Israel, the PLO, the Ayatoilet, Obama, oops, Osama bin Laden, the seizure of the mosque in Mecca...