[1] In 1945 he got a job as a draughtsman in Brussels with World Press, the syndicate of Georges Troisfontaines, which worked mainly for Spirou magazine.

After a few years, Charlier stopped all work on the drawings and concentrated only on the scenarios, on the advice of Jijé, then the senior artist at Spirou.

[1] Unable to support himself writing comic scripts at a time when Dupuis concentrated almost solely on the magazine and albums were few and far between, Charlier qualified for a pilot's license in 1949 and briefly flew for the airline SABENA.

The latter series was continued from 1954 on by Octave Joly and was a place where many young talents published their first comics, including Jean Graton, René Follet and Hermann Huppen.

[2] Charlier visited the United States in 1963 and a tour of the American West inspired him to create Fort Navajo, a western series, for Pilote.

He chose an artist Jean Giraud (Moebius), then a commercial illustrator who had briefly worked with Jijé on Jerry Spring, a popular European western strip.