He served his National Service in Algeria from 1959 as a paratrooper in the 3rd Marine Infantry Parachute Regiment (3e RPIMa). After nearly 2 years fighting a war he opposed, Caron refused to fight after the Generals' putsch, an aborted coup d'état attempted by 4 former French generals in April 1961. As a result, he spent 2 months in a military prison before finishing his military service in 1962.