I'm writing from France, where I research the origins of my family name - Develon. This name is extremely rare in France as there is about only 30 persons having this name in France now. I've found this name on a card where these sentences are written:
"Develon, Robert.
12 Virginia Regiment.
(Revolutionary War.)
Private / Private
CARD NUMBERS"
and then a list of numbers.

I have a few questions about this card:
What was it used for?
How can I get more information on this person to see if he could be related to my family?

Thanks a lot for your help.

Sophie Winandy