When the Congress of 1856 was installed, Aramberri was elected as a substitute for Dr. José Sotero Noriega for deputy for the third district. When Vidaurri was attacked on the occasion of the annexation of Coahuila to Nuevo León , Aramberri went to Monterrey to fight Juan José de la Garza in the Citadel alongside Ignacio Zaragoza. In 1856, when the state resisted the Comonfort statute , Aramberri, with the forces of the canton of Galeana, observed the movements of Vicente Rosas Landa and conferred with him at Matehuala which led to the Treaty of Cuesta de los Muertos.
