The team began in 1975 as a member of the Richelieu Junior league, when the Boucherville Sieurs moved to Longueuil. In 1983, when the Richelieu league folded, they joined the Quebec Inter-Regional League until 1988, when they joined the newly-formed Quebec Junior A league.
Longueuil Jets Edit
The Sieurs were preceded in the Richelieu league by the Longueuil Jets, in 1970. In 1972 the Jets joined the newsly formed Quebec Junior A league (and were renamed the Rebels). When the Rebels folded in 1975, the Sieurs of the Richelieu league moved to Longueuil to keep a junior hockey presence in the city.