But in 1964 the Caso Montenegro , in which the FELN was involved , hit the headlines of the Spanish press .
Owing to its scant activity , the Spanish National Liberation Front remained relatively obscure throughout its existence .
In 1964 the Caso Montenegro , in which the Spanish National Liberation Front was involved , hit the headlines of the Spanish press .
Owing to its scant activity , the Spanish National Liberation Front remained relatively obscure throughout its existence .