Peralta Ramos became a large clothing supplier to the Argentine Army during the 1829-52 regime of Governor Juan Manuel de Rosas, of whom Peralta Ramos became an official supporter in 1842. A wealthy man by the time of Rosas' overthrow at the 1852 Battle of Caseros, he traveled in 1860 to the Atlantic Ocean shore, where he purchased over 136,000 hectares (340,000 acres) from Portuguese Consul and entrepreneur José Coelho de Meyrelles, and a meat salting house.