When the Catalan Civil War broke out between the Generalitat and John II of Aragon "the Great", the lower nobility stood on the side of the King, who took the contact which was among the remensa peasantry and the gentlemen to bring to their cause the whole of the farmers.
[2][4] Verntallat and his army occupied Olot, Castellfollit de la Roca, Banyoles, and the castles of the mountain, fought in numerical inferiority against the various forces of the Generalitat; Hugh Roger III of Pallars Sobirà, Henry IV of Castile, Peter of Portugal and John II, Duke of Lorraine.
The war had ups and downs until finally on 28 October 1472, the troops of John II came to Barcelona, where it is signed the Capitulation of Pedralbes, which the Principality of Catalonia retained its charters and privileges.
After the defeat of Joan Sala, the Lords were seen as winners of the war and were willing to maintain and even to accentuate the evil customs, but Verntallat was able to keep possession of his mountain castles and his forces.
[2] Once the principal demands of the remences was achieved, Verntallat remained for a time at the Court of the Catholic Monarchs until he returned to his castle of Sant Feliu de Pallerols, where he died at the end of the century.