Baltasar Hidalgo de Cisneros
The news of the fall of the Junta of Seville reached Buenos Aires in May 1810. With both the king of Spain and the Junta removed of power, many people thought that Cisneros had no legitimacy to govern, starting the May Revolution. Cisneros tried to calm down the population, to no avail. He called the commanders of the local armies and requested their support, but they denied it. Cisneros was ultimately forced to allow an open cabildo, which would discuss what to do. Although those meetings were usually composed of the wealthiest population, the army and a group of rioters plotted to prevent the entry of many wealthy people and allow common people instead.
May Revolution
The Captaincy General of Chile followed a process analogous to that of the May Revolution, and elected a Government Junta that inaugurated the brief period known as "Patria Vieja". The Junta was defeated in 1814 at the Battle of Rancagua, and the subsequent Reconquista of Chile would make it a royalist stronghold once more. The Andes provided an effective natural barrier between the Argentine revolutionaries and Chile, so there was no military confrontation between them until the Crossing of the Andes, led by José de San Martín in 1817, a campaign that resulted in the defeat of the Chilean royalists.