Hugh,
I am far to be a French awards expert, but I think that your guy might have received a "citation à l'ordre du régiment", which could similar more or less to "MiD". I remember that existed (and still today?) various levels of "citation", the highest being "citation à l'ordre de l'armée". I am not sure that any medal was associated to a "citation" but was written in his personal military file.
Phil
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