Ask a youth when the Civil War and WWII took place and you will be lucky to get an answer within 50 years of the actual dates.
I had a teacher years back who used to hate and loathe teaching the civil war. It was one of the only classes I ever had where if you asked questions regarding the civil war, she reacted with hostility.
It was simply, north good, south bad, slavery only issue, any kind of question outside of having these as answers makes you bad.
She made an african american student look like the 2nd coming of the Klan when she asked a couple of very simply questions. (teacher confused the students anti-war beliefs with being a closet southern sympathizer).