A Committee of Public Safety, with general Jacques Massu as its leader, had been formed to demand Charles de Gaulle's return but many supporters became anti-Gaullist.

Chassin was the head of the patronage committee of the Association des combattants de l’union française (ACUF) which had amongst its members prominent military and right-wing elements.

[4] Martel succeeded him as the MP-13 leader and a logo of a heart mounted by a cross (as that worn by the celebrated local Roman Catholic martyr Charles de Foucauld) was agreed upon.

On its national council of twenty members were former Alsatian regionalist and Nazi collaborator Joseph Bilger - general secretary and treasurer of the party - lawyer Roger Girard and militant nationalist Dr. Henri Martin, all former Cagoulards.

[5][1][2][3] The MP-13 collapsed in 1960 after an arrest order was issued for Martel, Martin and Crespin because of their support of "la semaine des barricades" which began on 24 January of that year, leading to the Algerian War; they went into hiding.