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 Day riots of 1894
One of the major causes of the riots was the Panic of 1893. The panic precipitated one of the most severe depressions in American History. The closure of two major railroads and other major companies triggered a stock market collapse. The New York banks had heavily invested in the stock market, and bank failures soon began. This caused a contraction of credit, and many other, newer, businesses started to shut down as well. The depression produced widespread social unrest, mostly among the now-unemployed workers. Some people tried to create public works programs for the unemployed, but this was unsuccessful.