Historiography of the May Revolution
Historiographical studies of the May Revolution started in the second half of the 19th century in Argentina and have extended to modern day. All historiographical perspectives agree in considering the May Revolution as the turning point that gave birth to the modern nation of Argentina, and that the Revolution was unavoidable in 1810. The main topics of disagreement between Argentine historians are the specific weight of the diverse causes of the May Revolution, who were the leaders of it among the different involved parties, whenever there was popular support for it or not, and whenever the loyalty to the captive Spanish king Ferdinand VII was real or an elaborate masquerade to conceal pro-independence purposes.
Eustaquio Díaz Vélez
Díaz Vélez had good relations with the conspirators who, before 1810, sought to achieve the independence of his country. He actively supported the May Revolution, participating in the meetings that decided the dismissal of Viceroy Baltasar Hidalgo de Cisneros, attending the one of May 19, called by Nicolás Rodríguez Peña. On the occasion of the Open cabildo of May 22, Colonel Cornelio Saavedra appointed him as head of the Patricians guards that enabled the assembly meeting that expressed the will of the people.