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.
Gaafar Nimeiry
In 1969, together with four other officers Colonel Nimeiry overthrew the civilian government of Ismail al-Azhari. His coup was named the "May Revolution" and he became prime minister and chairman of the Revolutionary Command Council (RCC). He started a campaign aimed at reforming Sudan's economy through nationalization of banks and industries as well as some land reforms. He used his position to enact a number of socialist and Pan-Arabist reforms.