Maréchal-des-logis (literally translated as "Marshal-of-Lodgings") is a sub-officer rank used by some units of the French Armed Forces. It is traditionally a horse units rank. There are three distincts ranks of maréchal des logis. These ranks are equivalents of sergeant ranks.
Both ranks are roughly equivalent to a British or Commonwealth sergeant. The Maréchal des logis-chef corresponds quite closely to the US use of the rank of staff sergeant.
The rank of maréchal des logis is used by the Armoured Cavalry, the Artillery, the Materiel, the Commissary and the Transport corps, all of the French Army, and by the Gendarmerie Nationale.