[citation needed] During the first months of 1849, he served as Tribune and when the liberal government entrusted him with the Ministry of Finance, he participated in the fight to defend the square, besieged by Pedro Santana, after the victory of the Battle of Las Carreras, and when the government of Manuel Jimenes fell, he was exiled.
[citation needed] Some time after returning to his homeland, he became entangled in the revolutionary conspiracy that brought Pedro Eugenio Pelletier to the brink of death in 1855, but the plans did not turn out as Jacinto wanted, so he had to go into exile.
[2] After President Manuel de Regla Mota protected him, granting him amnesty, in 1856, and upon returning to the country, he gave a different direction to his public life, since in the then First Dominican Republic, things did not turn out as the Trinitarios dreamed, with a just homeland for all, therefore Jacinto was a crueler person and more distant from the social problems of the time.
[citation needed] Perhaps it is somewhat ironic to know that Jacinto de la Concha was one of those who embraced the cause of annexation to Spain, but that was the case, since the change of regime was very pleasing to him, so he had to fight against the people.
[citation needed] When Buenaventura Báez regained power, Jacinto de la Concha found his political center of gravity in the leader.