My grandfather's cousin was KIA 15 Sep 1918 aged 20. The first time I read that info, I cried. My grandfather returned, or I wouldn't be here, as did an older brother, but their eldest brother did not, dying in Egypt.
Every time I see how YOUNG those boys were, my heart aches for them and their families. I did my best to bring my children up to respect the sacrifices made - of time and youth, if not life. I think it worked.