On 2 August 1939 the new 'Lezignan' club joined Rugby league and participated in the 1939/40 season, unfortunately this would be the last one before war broke out. During the war the Vichy Government banned the sport and made players play union, after the war the club resumed playing Rugby League. The revival of the club began in 1954 with the appointment of Edouard Ponsinet as captain-coach and of the arrival of new president Me Fau. They won their first junior title, then in 1960 the club won their first major trophy winning the Lord Derby Cup under Andre Carere. The following season the Sangliers lifted the French Rugby League Championship for the first time beating Roanne XIII in the final. In 1963 they won their second title, with the juniors doing even better as they completed a league and cup double. Two more cup wins followed for the first team in 1966 and 1970.