The standard place to look to find the grave of an ancestor who died fighting for France is the War Graves page, Sépultures de Guerres, on the Mémoire des Hommes website run by the Ministry for Defense. For the names of many who died in World War I, but not their burial places, one can resort to the listing of names from Monuments aux Morts on Mémorial GenWeb. What, however, to do if your ancestor died for France but not in a great battle and was not buried in a military cemetery? Thousands of such men and women are buried in town cemeteries all over France and the Ministry for Defense has not listed them.
A gentleman named Jacques Seynaeve is attempting to redress that failing with his own website of a most long-winded name: SÉPULTURES COMMUNALES INDIVIDUELLES DE MILITAIRES DE TOUTES ÉPOQUES ET DE MORTS POUR LA FRANCE (hors nécropoles nationales, cimetières et carrés militaires). He now has over eight thousand names and photographs of graves. Hundreds have been contributed by people from all over France (and a few other countries) and continue to be added.
Usefully, he also has a section of "Noms Associés" that is, names of spouses and relatives of a deceased person, which may help in location and identification. Would that Mémoire des Hommes would do something like that! You may be able to find your ancestor's grave via this website and we do hope so but hurry; these pages personnelles on Orange tend to disappear without warning and without a trace.
©2019 Anne Morddel