On 19 April 1919, the crews of the battleships "Jean Bart" (commander, capitaine de vaisseau du Couedic de Kerérant) and "France" (commanded by Vice-Admiral Jean-Françoise-Charles Amet) mutinied. Although their sympathies lay with the Reds and not with the Whites, the crews' primary grievances were: (i) the slow rate of their demobilisation (following the end of World War I) and (ii) the small quantity and atrocious quality of the rations. The French government acceded to the mutineers demands but pursued the ringleaders. (Amongst these was Charles Tillon, with whom Marty was to have a life-long association.) With the passage of time, Marty's precise role is unclear. He was nevertheless duly arrested, tried, and sentenced to twenty years imprisonment at hard labour.