 On 18 February 1920 Vuillemin and his observer, Lieutenant Chalus, complete the first flight across the Sahara Desert from Ramanrasset to Ménaka.He was later given command of the ‘11e régiment d’aviation de bombardement en pays rhénan’ (11th Bomber Wing of the Rhine), and then put in charge of air operations in Algeria in 1925.He became a colonel in 1928 and assumed command of air operations in Morocco in 1932.