In early September 1939, the 9e Corps was re-created in Tours, under general Émile Laure, from elements of the 9th military region.
From late 1939 to May 1940, the 9e Corps was deployed around the Saint-Avold - Faulquemont sector, in Moselle, with the general staff in Landroff.
On 27 May, the Corps marched towards Sarcus, and then to Lyons-la-Forêt, in Normandie, along with general Altmayer's 10ème Armée.
Attempts at organised defence were bypassed by the Germans and these units were forced to fall back.
The remnants of the 9e Corps were eventually surrounded in Saint-Valéry-en-Caux and surrendered on 12 June 1940.