He stood out in the Battle of Santiago, alongside José María Imbert against the invading Haitian army, led by Jean-Louis Pierrot.
He later became involved in the early conspiracies against Pedro Santana, in which he faced persecution and subsequent exile, where he died.
In 1844, during the Battle of Santiago, he had a prominent role after the Dominican governing board have called the general José María Imbert, who asked to be accompanied, among others by Pelletier, then Colonel and Chief of the main line.
Two years later, in 1855, he joined a conspiracy movement to restore power back to Báez.
He sought out generals Antonio Duvergé and Francisco del Rosario Sánchez for support in this movement.