Armée de l'Air started to receive the Bloch 131s in September 1938. The Bloch 131s performed so poorly that they were sent to reconnaissance squadrons.
Start of World War II
There was one reconnaissance group in North Africa and six groups in France.
The Bloch 131s were used in daytime reconnaissance missions over Germany, but due to heavy casualties they were switched to night missions.
The Potez 63 replaced the Bloch 131s in all the units located in France by May 1940.
The Vichy French used the remaining Bloch 131s as target tugs.