After a long exile in Cuba, during the Spanish Civil War, Pallarols was a technical adviser to the libertarian collective of Llíria, in the province of Valencia.
[1] Pallarols immediately contacted three libertarian leaders who were in hiding in Valencia - José Cervera Bermell, Luis Úbeda Canero and Leoncio Sánchez Cardete - and the four of them formed the national board of the Spanish Libertarian Movement (MLE), established on 26 February 1939 by the CNT, the FAI and the FIJL.
To cover up the journeys, Pallarols created the shell corporation Frutera Levantina, officially dedicated to transporting fruit from Valencia to other parts of Spain.
The task of creating the links in Catalonia and Occitania was entrusted to Génesis López and Manuel Salas, both recently released from the Albatera camp, who made contact in Nimes with various members of the MLE, and then López was taken to Paris where she met with the general secretary of the CNT, Germinal Esgleas, his companion Federica Montseny, and a few other libertarians.
[3] During his arrest, which according to other sources took place in Barcelona in February 1940, he was tortured: "He was given electric shocks, hung by his feet, subjected to fasting and sleep deprivation... until he spoke".