Thanks Luc, I had not seen that.
In the meantime I have found two ways of finding my case:
_ findagrave has often a picture of the grave or memorial where one can read the unit (example:
https://fr.findagrave.com/memorial/5...james-c-conlon)
_ there are also lists on the web listing data available on ABMC in text format. Example:
http://www.interment.net/data/tunisi...ecords-c-d.htm
Best regards