In reality, the congressmen who were assembled in Tucumán declared the independence of the United Provinces of South America, which is one of the official names of the Argentine Republic.
On April 15, 1815, a revolution ended the mandate of Carlos María de Alvear as Supreme Director and demanded that a General Congress be summoned.
Delegate deputies, each representing 14,000 inhabitants, were sent from all the United Provinces of the Río de la Plata to the sessions, which started on March 24, 1816.
The Declaration pointed to the circumstances in Europe of the past six years—the removal of the King of Spain by Napoleon and the subsequent refusal of Ferdinand VII to accept constitutional rule both in the Peninsula and overseas.
The Document claimed that Spanish America recovered its sovereignty from the Crown of Castile in 1808, when Ferdinand VII had been deposed, and therefore, any union between the overseas dominions of Spain and the Peninsula had been dissolved.