In the 1934–35 season, Sochaux captured its first league title finishing one point ahead of Strasbourg. Led by Uruguayan manager Conrad Ross, as well as captain Étienne Mattler, known as "Le Lion de Belfort", and strikers Roger Courtois and Bernard Williams, Sochaux dominated the league losing only four times. Two seasons later, the same team, with the addition of goalkeeper Laurent Di Lorto and the Swiss duo of André Abegglen and Maxime Lehmann, Sochaux won its first Coupe de France title. The club faced league rivals Strasbourg in the final and defeated the Alsatians 2–1 courtesy of goals from Williams and the Argentine Miguel Angel Lauri. Ross finished his career at Sochaux by winning another league title in 1938. After the 1938–39 season, Ross and several players departed the club to play and manage abroad due to the onset of World War II. The non-deserters were, subsequently, called into action to fight with the French Army, which ultimately caused the club to limit its aspiring ambitions.