Jeanpierre wanted to pursue operations in the Atlas Mountains. Consequently, he adopted helicopters which would allow him to be present anywhere while surveilling all operations and leading assaults from the ground. His stationary code radio name was " Soleil" (The Sun). He operated in the Sahara for some time. On 19 January 1958 the 1st Foreign Parachute Regiment left the Sahara after defeating ALN guerillas who wanted to compromise the security routes of oil convoys. Following him securing the petrol routes in the Sahara, combat operations engaged the regiment in the region of Guelma during the Battle of the borders. Pierre lead para assaults from the air and ground. On 24 January, 75 rebels were put outside of combat, and 6 heavy machine guns were stripped from then. Until March 1 and during 3 months, 1300 arms out of which 120 automatic machine guns were stripped from militants whom lost considerable influence over the region of Guelma. Pierre had at his command not only his regiment but also support units and troop unit sectors that could be available for him. At his disposition were several helicopters out of which "Alouette" was the main one he used. Pierre was all over the air, as he permanently hovered above his companies. Launching his ideas, Pierre successfully applied putting into motion various tactics such as night operations, artillery support, heavy helicopter transport, aerial observations and aerial bombardments. Pierre privileged intelligence, speed and surprise to apprehend an adversary with no escape. Pierre's most difficult idea: launch the assault by close range corps-a-corps combat, the essential role of the infantry and choc troops. Pierre Paul Jeanpierre lead the usual example in the field amongst his legionnaires and also slept sitting on the terrain, retaking habits adopted in Indochina. On 13 May 1958 Pierre was conducting and focusing on tasked operations while events stirred up in Algeria with the May 1958 crisis, he considered his mission unchanged. Accordingly, the regiment made way towards the mountains and canyons. While providing mobile leadership from the air followed by ground assaults, recon, intel, and direction to his combat companies from the "Alouette" in which he was hovering close to a little mountain. He was at the time pursuing several ALN militants. While commanding his troops, a shot striked Jeanpierre against the pilot fired by hidden Algerian insurgents. Shortly after, Captain Ysquierdo reported on the radio the following message: "Soleil