The new club had a good relationship with the later which helped in the formation and lead to the first three games of the new FV being played against French military teams.

Diefflen rose to the Kreis-Liga Saar-Mosel by 1930, the local second division of football, where it faced much stronger opposition, like Eintracht Trier.

[1] In post-Second World War football FV Diefflen played a number of seasons in the tier-three Amateurliga Saarland, the highest league in state, from 1956 to 1961 and, again from 1962 to 1964 and in 1970–71.

The later meant a more permanent departure from the states highest league, with FV Diefflen not to return to this level for 40 years.

After an era of local amateur football play the club returned as a lower table side in the Bezirksliga Saarland-West in 1978–79 and, again, from 1990 to 1994 but was relegated again on both occasions.