On leaving the École Niedermeyer, Fauré was appointed organist at the Church of Saint-Sauveur, at Rennes in Brittany. He took up the post in January 1866. During his four years at Rennes he supplemented his income by taking private pupils, giving "countless piano lessons". At Saint-Saëns's regular prompting he continued to compose, but none of his works from this period survive. He was bored at Rennes and had an uneasy relationship with the parish priest, who correctly doubted Fauré's religious conviction. Fauré was regularly seen stealing out during the sermon for a cigarette, and in early 1870, when he turned up to play at Mass one Sunday still in his evening clothes, having been out all night at a ball, he was asked to resign. Almost immediately, with the discreet aid of Saint-Saëns, he secured the post of assistant organist at the church of Notre-Dame de Clignancourt, in the north of Paris. He remained there for only a few months. On the outbreak of the Franco-Prussian War in 1870 he volunteered for military service. He took part in the action to raise the siege of Paris, and saw action at Le Bourget, Champigny and Créteil. He was awarded a "Croix de Guerre".