That's just flat out wrong. Did you read the link provided? Truman was under fire numerous times.
I'll take the word of the Rangers re Lincoln.
As for FDR, he was 37 years old at the entry of the US into World War I.
And he didn't volunteer, sounds like a chickehawk.
I read the article and knowing how citations are written and for what I discounted it.
With no medals mentioned or awards listed about worth the electrons it was written with.