Gilbert Auguste Bostsarron was born in 1903 in Saint-Galmier, Loire.
He was educated as an engineer at the École de la Métallurgie et des Mines in Nancy.
In 1940 he became responsible for the management of the company after its director had fled to Canada.
He contributed to the underground publication La Voix du Nord, and joined the Libération-Nord resistance movement, taking advantage as his position as director of the Société franco-belge to pass information whilst on business trips to Lille and Paris, and arrange the aerial bombing of the workshops of the franco-belge when a German locomotive was being serviced there.
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