text: On 31 May 1953, they got back to winning and earned their fourth Coupe de France trophy in a 2–1 final win against FC Nancy, before 60,000 spectators. The club then won its second domestic title in 1953–54, having only conceded 22 goals within 34 games. After this season, Lille is praised for its defensive proficiency and acquired a reputation as a rock-solid defense. A year later, Les Dogues earned their fifth Coupe de France in a 5–2 win against Bordeaux in the final. This period of glory and hegemony, occurring after the war and the German occupation of France, has led to one of the club's nicknames: La Machine de Guerre (French for "The War Machine"). Within its first decade of existence, the club gathered the vast majority of its major trophies, winning two league titles and reaching the second place for four consecutive seasons. Lille, known as the best French club in the post-war period, accumulated five Coupe de France wins in seven finals, including five successive finals and winning the trophy three times in a row, one of the best performances in the history of the tournament.
  Decline and several spells in lower levels (1955–1978)
  The 1955–56 season happened to be highly complicated. The club suffered from internal conflicts,  was contested and certain players refused to play some matches. In the field, the Northmen were way too irregular and crumbly in defense, and finished in 16th place. Lille were relegated for the first time in their history in 1956. This relegation is accompanied by aggravating financial consequences. Best players' departure is necessary to cover debts which are becoming substantial. Failing to rebuild a top team due to the increasingly poor financial situation, the club began a series of promotions and relegations. Promoted in 1957 by beating Rennes, Lille initially ended up to an unexpected 6th place. The club then finished in eighteenth place the following season; being relegated a second time. After a few years spent in Division 2, the club became a mid-table side in the late 1960s. From 1964 to 1968, the club managed somehow to avoid relegation to the lower level. After a long drought, the worst occurred when Lille abandoned its professional status on 23 June 1969, lacking facilities and resources.