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
At dawn on May 23, the Cabildo informed the population that the Viceroy would end his mandate. The highest authority would be transferred temporarily to the Cabildo until the appointment of a governing junta. Notices were placed at various points throughout the city, which announced the imminent creation of a junta and the summoning of representatives from the provinces. The notices also called for the public to refrain from actions contrary to public policy.