Let's start with what you have.
A name written on the back of a photograph. A service number on a discharge paper. A story about the winter he spent somewhere cold in Europe. That's where most families begin, and it's enough to ask: we look first, free, and tell you honestly what we believe the records hold.
Then everything you can add — a birth year, a hometown, the discharge paper folded in a drawer — narrows a thousand men with his name down to one. The more you bring us, the more we can bring back.
No discharge paper anywhere in the house? There's a good chance his county courthouse still holds a copy, and we'll help you request it.