The club won the 2012
KNVB Amateur Cup. In 1999, Leonidas won the
KNVB District Cup in the (now defunct) West IV District. In August 2020, reports surfaced indicating the potential dissolution of the club, based on recommendations from board members Geert Hof and Bart Kreft, citing years of financial and organisational challenges. The club faced difficulties in mobilising volunteers, experienced a decline in financial resources, and accrued a debt of €100,000. Discussions were held with
SVV from
Schiedam regarding a possible merger, which was ultimately rejected during a General Assembly of the Schiedam-based club. Consequently, a reboot was initiated, with several teams lower ranked teams of the Saturday department. Subsequently, in April 2021, the youth department separated and rebranded as FC Banlieue. ==References==