Having been an apprentice pilot at sea since 1865, Gauguin enlisted in the French Navy in 1868 and served aboard the cruiser Jérôme Napoléon during the Franco-Prussian War in 1870. In April, 1871 he left the Navy and, at the recommendation of his godfather Gustave Arosa (who also was a patron of Pissarro), joined the stock brokerage firm of Bertin in Paris. During this time Arosa's daughter Marguerite taught the young man to paint in oil. In 1877 Gauguin met Pissarro through the Arosa family; the older painter soon introduced Gauguin to Cézanne, Guillaumin and the other members of the emerging circle of artists who had been labeled 'Impressionist' after their first group exhibition in 1874.