Cup in 1937 and the final in 1939. The Ligue de Tunisie de Football Association (LTFA) which was a Tunisian body affiliated to the French Football Federation has organized the national competitions during this period of the French protectorate of Tunisia. Disruptions (1940–1946) The outbreak of the Second World War disrupts sports activity: the team plays against El Makarem de Mahdia and the Patriote de Sousse in 1941 and a lost final of a Center-South region against the CS Gabèsien in 1942. This period saw the confirmation of great players like , Habib Mougou, Sadok Soussi, Abdallah Ghomrasni, Abdelhamid Blal and Aleya Douik. The halting of competitions in the region leads to join the ranks of Grombalia Sports. The team resumed its activity in 1946: they won the Center-South championship but failed against the CA Bizertin in the national final and also lost the final of the Tunisian Cup against the other club of Bizerte, the Patrie Football Club bizertin. Privileged position at the national level (1947–1955) From 1946 to 1947, the Tunisian football championship was organized at the national level. The team that has never left the national division that called "Division of Excellence". In 1947, the team settled in fourth place in the local league in addition to the early exit of the cup from the round of 16 against the US Béja and Habib Mougou scored 13 goals to be the scorer of the team followed by Hamed Douik with 6 goals. In the following year, ES Sahel maintained the same position in the league and was defeated in the Cup against Patrie Football Club bizertin in the semi-final. Mougou was the team's top scorer for the second year in a row with 11 goals In 1949 the team advanced and a finished second in the tournament and Habib Mougou was again a scorer with 10 goals and withdrew from the cup in the quarter-finals against the CS Hammam-Lif. The team waited until 1950 to win their first league title, and Habib Mougou was the national league's top scorer with 20 goals, but he lost the cup final to CS Hammam-Lif again. ESS's first major honour was the Tunisian Ligue Professionnelle 1 title in 1950, but they had to wait 8 years to pick it up again. In the year that followed this season, the team finished sixth in the championship, as was Bechir Jerbi, the team's