My DD is in year 3 (8 yr olds) and is studying WW2. I don’t know the extent of what they cover at school but my mum brought round some WW2 diaries including a lady who was in Jersey during it’s German occupation and other accounts of women who helped in the war effort and felt responsible for deaths, with one killing herself. I do not think this is appropriate reading for an 8 year old.
My DM used to read me Anne Frank’s diary as bedtime reading when I was a kid and I have refused to engage in anything to do with the wars since I was so disturbed. I avoided history at school and can’t watch films about it etc.
AIBU or are some accounts of the wars not appropriate for primary age children.