What's the "Corps Franc d'Africa"?

[Tortue Agile]

If you can find Les Forces Francaises dans la lutte contre l'Axe en Afrique -La campagne de Tunisie 1942-1943 by Spiva and Leoni (service historique) you will see page 311 up to page 325 all about the birth and operational use of the corps franc d'Afrique.
Created by the initiative of Giraud on November 25th 1942, made up of volunteers who were not assigned to the army. At the beginning it was supposed to be constituted of 2 half-brigades of 3 battalions each. The 2 first battalions equipped with British material (no artillery and only light armament) are then send on the left of the British army. etc..