The English translation of the name is the Twenty-fifth of May, which is the date of Argentina's May Revolution in 1810.
After the May Revolution that initiated the struggle for independence of Argentina from Spain, the army led by General Manuel Belgrano passed by.
The film's plot took place little after the May Revolution, when a young man left his realist uncle and becomes drummer of the revolutionary army.
In late 1810, after the May Revolution, Ibarra joined the army that made the first expedition to Upper Peru (Bolivia).
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The first Federalist leader in the Platine Region was José Gervasio Artigas, who opposed the centralist governments in Buenos Aires that followed the May Revolution, and created instead the Federal League in 1814 among several Argentine Provinces and the Banda Oriental (modern-day Uruguay).
Later, he turned to Argentine nationalism, stimulated by gauchesco literature in the overture Don Segundo Sombra (1954) (after the novel by Ricardo Güiraldes), popular urban music in Tangos y milongas for piano (1948–59), rural folk music in Tres danzas populares, and historical themes in the Seventh Symphony, commemorating the Argentine Independence Revolution (Salgado 2001).
He had a curacy at Maldonado, Uruguay during the British invasions of the Río de la Plata, and returned to Buenos Aires in time to take part in the May Revolution of 1810.
The May Revolution commemoration on 25 May was marked by the refusal of many priests to celebrate the traditional Te Deum in Rosario and nearby towns.