Argentina's independence was declared by the Congress of Tucumán, breaking ties with the Spanish monarchy
Background
On 9 July 1816 representatives of the United Provinces of the Río de la Plata met in the Congress of Tucumán and signed the Act of Independence.
The declaration formally broke the ties of dependence with the Spanish monarchy.
Ten days later the same Congress renounced all other foreign domination.
The act concluded the process that began with the May Week (Semana de Mayo) of 1810. 9 July is Argentina's Independence Day.
Independence declared:
9 July 1816
Body that declared it:
Congress of Tucumán
Earlier milestone:
Semana de Mayo, 1810
Why it matters for exams: Independence dates and the founding events of a nation are standard history and general-knowledge questions.
Kerala PSCUPSC
In plain words
Semana de Mayo May Week — The May 1810 events that began Argentina's emancipation process.