Interesting 35 page PDF from independent American Textbook Council on the differences injected into history books as Q has mentioned on several occasions. This practice extends way past WWI and WWII!!

p. 4

But Western antiquity, Judaism and Christianity, and the rise of modern democratic government, reviewers complain, are lost in a procession of trivia designed to satisfy competing demands for inclusion, diversity and multiple perspectives.

What should be central topics and themes are compressed to make room for new topical material, some of it ideologically loaded.

https://files.eric.ed.gov/fulltext/ED485622.pdf