Congress of Tucumán

Nevertheless, some territories that formerly belonged to the Viceroyalty of the River Plate did not take part in the Congress: the delegates from the Banda Oriental ('Eastern Bank', today Uruguay) and other Liga Federal provinces, faithful to the democratic federalist project of José Gervasio Artigas were rejected based on formalities; Paraguay had already proclaimed its independence from Spain and remained isolated from the United Provinces politics.

The congress was inaugurated in the house of Francisca Bazán de Laguna, consisted of 33 deputies, and its presidency rotated on a monthly basis.

On July 9, it declared the independence of the United Provinces of South America, a name that was intended to appeal and eventually incorporate other Spanish American independentist regions that were not represented at the Congress.

At that time, the President of the Congress was Francisco Narciso de Laprida, delegate from San Juan Province.

Subsequent discussions centred on the form of government that the young state should have and were the Congress and the executive power should reside.