From all the segments promised at the end of History of the World: Part I (1981), only the segment "A Viking Funeral" is not included at all in this sequel. In History of the World: Part II (2023), "Hitler on Ice" is featured at the start of the first episode and "Jews in Space" is featured at the end of the eighth episode.
The credits for the "Shirley!" 70's sitcom segment Shirley Chisholm (Wanda Sykes) have billing that states it was created by Melvin Kaminsky which is the actual real birth name of Mel Brooks.
Mel Brooks in the original History of the World: Part I (1981) played five roles: Moses, Comicus, Torquemada, Jacques and King Louis XVI. In History of the World: Part II (2023), he plays two: The Narrator and Himself, the latter via a CGI enhancement. Brooks does appear though as himself without CGI augmentation in the series trailer.
Show-business trade-paper 'Variety' reported in their 21st October 2021 edition that Mel Brooks would produce this series as a direct sequel to his film History of the World: Part I (1981). Hulu ordered eight episodes. The writers room would begin that month with production slated to begin in Spring 2022.
In the Civil War segment, Ulysses Grant and Robert Todd Lincoln go to West Virginia, which is depicted as enemy territory and strictly Confederate. In reality, West Virginia represents 50 counties that chose to leave Virginia in order to stay with the Union. While technically the last slave state added to the Union, it did so with the provision that it would abolish slavery and did so within 18 months. Most of the state was solidly Union. While some of the eastern counties were mixed, the Confederacy were never able to threaten the Union's hold on the state. Grant and Lincoln certainly wouldn't be scared to go there nor would there be a Confederate flag so brazenly hung up in a saloon.
Danny DeVito: As Tsar Nicholas II in Episode 1 with the character name billed as Czar Nicholas. The real life person is also known as Nicholas II, Nicholas II of Russia and Nikolai II Alexandrovich Romanov.