As I remember it, the reason we didn’t have enough time to cover the rest of the book is that we spent a full 6-7 years learning about WWII repeatedly. Like the same fucking curriculum multiple years.

Ah, the good old "We're not sure what the previous class was teaching so let's redo the whole thing" level of public school coordination.

Didn't you know? The history of the US was 97% compromised of the Revolution, the Civil War, and World War II.