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 United States' declaration of independence from Great Britain in 1776 led criollos (Spanish peoples born in the Americas) to believe that revolution and independence from Spain were feasible. Between 1775 and 1783, the American patriots of the Thirteen Colonies waged the American Revolutionary War against both the local loyalists and the Kingdom of Great Britain, eventually establishing a popular government in the place of the British monarchy. The fact that Spain aided the colonies in their struggle against Britain weakened the idea that it would be a crime to end one's allegiance to the parent state.