Design of this machine was by SAF-Avions Dewoitine but owing to over work at that companies plant at the time, manufacture of the D.37/01 was transferred to Lioré et Olivier.

They saw action as escorts of a bombing raid against Talavera de la Reina, Toledo that destroyed the headquarters of General Juan Yagüé.

These three D.371s had successfully defended their bombers against the attacks of six German Heinkel He 51 biplane fighters - an older-design aircraft with inferior performance.

However, they reappeared later in some squadrons and one is known to have flown with the 71 Fighter Group by the Yugoslav (Slovenian) volunteer pilot Josip Križaj.

All Dewoitines left were practically destroyed after having been bombed by the Legion Condor aircraft in the airfield of Bañolas.