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
Buenos Aires endured the whole Spanish American Wars of independence without being reconquered by royalist armies or successful royalist counter-revolutions. However, it faced several internal conflicts. The May Revolution lacked a clear leader as other regions of Latin America; the secretary Mariano Moreno led the initial phase of the government, but he was removed shortly afterwards.