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.
Juan Manuel de Rosas
The May Revolution of 1810 marked the early stage of a process which later led to the disintegration of Spain's Viceroyalty of the Río de la Plata, independence and the eventual formation of Argentina. Rosas, like many landowners in the countryside, was suspicious of a movement advanced primarily by merchants and bureaucrats in the city of Buenos Aires. Rosas was specially outraged by the execution of Viceroy Santiago Liniers at the hands of the revolutionaries. Rosas felt nostalgic about colonial times, seeing them as stable, orderly and prosperous.