And important point I forgot, policeman (for sure) and army (I think) vote very predominantly for the far-right, and very little for Nupes.
A general idea of the vote of police and military https://twitter.com/Cluster_17/status/1544352151467528196?la... (to be taken with some distance, it is a poll from cluster 17)
Note that Melenchon was proposing to hire 10,000 more policemen