The MSR collaborated with and was a factions of the Rassemblement National Populaire (RNP), which was founded in January 1941.

A split in the RNP came after the Eastern Front opened up in July 1941, and the Legion of French Volunteers Against Bolshevism was formed.

In October 1941, Deloncle plotted against seven Parisian synagogues with the help of a local SS officer, Hans Sommer, who provided the explosives for the attack.

The other factions then coalesced around Jean Filliol, a former Cagoulard, and revolutionaries Georges Soulès and André Mahé.

The remaining Soulès faction of the MSR moved into an anti-German position but disappeared at the end of the war.