Why don't remember soldiers pre-WWI(and pre-Civil War in America)?

[Husar]

My grandpas didn't die in the war and they didn't tell me about it either. My dad's dad died long before I was born, my dad was born in January 45, my mom's dad died when I was one year old, my mom's mom doesn't like to talk about it a lot and has no clue what my grandads did during the wars. My dad doesn't know a lot either(he's from the Netherlands btw, don't think they put up a big fight where he lived anyway).
So for me Napoleonic Wars and WW2 aren't too different concerning the topic.

[CountArach]

We don't remember soldiers before then because we didn't have any