In spring 1941, continuing to refuse defeat, he secretly took part in the establishment of a plan of allied intervention in North Africa, with some comrades from the circles of General Maxime Weygand and Marshal Philippe Pétain.
Promoted to the rank of lieutenant-colonel in September 1941, he did not discontinue to work for the resistance in secret, by drawing up notes evaluating the technical bases for a future allied invasion of North Africa.
In disgrace, under Vichy orders he was put in control of regulating supply transport bound for the Rommel army, in accordance with the agreements passed through the general delegation of Weygand and Germany (Dankworth Contract).
Thus he would facilitate the occupation of strategic points by the resistance by providing them 'VP' arm-bands - 'Public Volunteers', with letters from the Public Commander destined for the military collaborationists, with mission orders to raise the state of security.
He personally carried out the arrest of General Louis Koeltz, Commander of the Algerian 19th Army Corps, and went onto the battlefront to put an end to the fire of a resistance battalion protecting the invasion point of Sidi Ferruch for the American troops.
The success of the putsch can be attributed to Germain Jousse, who allowed 400 armed civilians to arrest General Juin, Commander in chief, as well as the collaborationist Admiral Darlan, and who paralysed the mobilisation of the Vichyist 19th Army Corps during the 15 hours in which the Allied forces unloaded unopposed, encircled Algiers, and achieved surrender the same evening with its port intact.