 He participated in the creation of the First Junta ("Primera Junta") government on May 25 and was named Secretary of the Junta along with Mariano Moreno, with whom he shared political points of view.He was sent by the Junta to Montevideo (today's Uruguay capital city) to spread the ideas of the revolution.Paso was also part of the First Triumvirate and the Second Triumvirate that ruled the United Provinces of the Río de la Plata (Argentina) between 1811 and 1814.