He then volunteered for aircrew in naval aviation, becoming an observer, before training as a pilot and serving with Escadrille 3S1.
In 1936, the escadrille was transferred to the French Air Force and Accart became commandant of Escadrille GC 1/5, which would claim 71 victories during the Battle Of France, losing only one pilot to enemy fire.
He personally shared in the destruction of at least 12 Luftwaffe bombers during the battle.
On 1 June 1940, while intercepting a group of Luftwaffe bombers, Accart was hit by return fire, a bullet penetrating the windscreen of his fighter and lodging in his skull.
Accart managed to parachute to safety.
While recovering he wrote Chasseurs du Ciel (Hunter in the Sky), an account of his wartime actions.
After recuperating he was posted to the Southern region air defense Headquarters.
In November 1941 he attended the Air Academy in Salon de Provence.
Released from military duty in November 1942, he journeyed to Spain with several students, before arriving in North Africa after the Allied liberation.
He joined the Free French forces and was given command of GC 2/2 in January 1944.
He left in October 1944 to attend Staff School at Fort Leavenworth in the US.
In November 1960 he was nominated as the commandant of the first Tactical Air Command (CATAC) and French Air Force in Germany (FAFA), and promoted to major general in January 1961.
He retired as a lieutenant general as inspector of armament fabrication program In March 1965.
Jean Marie Accart died on 19 August 1992.