Jacques Géron started his comics career in 1970, when he won the fourth prize of the publisher Lombard, with his story 'Sargan et Merva'. He drew several police and science fiction stories for Artima. He also cooperated on the magazine Pilote and drew a a variety of strips, short stories and illustrations for the Dutch press, using the pseudonym Barney. From 1976, he was present at Curiosity Magazine and he began a longtime collaboration with the publisher Michel Deligne. He drew 'Le Fantôme de Géronimo' (text by Deligne, 1977), 'Les Conquistadores de la Liberté' (text by Nelod, 1978) and 'Visa Pour la Révolution' (1979).