Actually, the last square is in fact wrong, the only wars your Grandpa could have been in were ww1 (if he was ancient) through Vietnam, although if he was super young when he and his wife had your dad he could have served in a gulf war, still, all of these wars you needed to be at LEAST 18, the last war where extremely young kids fought was the revolutionary war and civil war, but you needed to be at least twelve then, so no American wars were ones he could have fought in, maybe some medieval wars could have had 8-year-olds, so he could not possibly have been in a war when he was 8, making your point in fact, invalid.