A merger with Fußball Club 1921 Neukölln on 26 March 1926 created Neuköllner Sportclub Marathon.

[1] NSC was an undistinguished side prior to World War II and briefly disappeared after the war when occupying Allied authorities banned organizations throughout the country, including sports and football clubs, as part of the process of de-Nazification.

Marathon was re-formed on 25 November 1950 and took part in lower-tier play in West Berlin.

In 1959, they won promotion to the Amateurliga Berlin (III) for a single season.

The team returned to higher-level football in 1989 after winning the championship in their first season of play in the Landesliga Berlin (V).