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On September 1, 1889, during the run-up to the Revolution of the Park, Gallo spoke at the great meeting of the Jardín Florida, which gave rise to the Civic Youth Union.
The article precipitated a historic political movement that led first to the creation of the Civic Youth Union, of which Barroetaveña was president, then to the creation of the Civic Union in 1890, then to the Revolution of the Park, and in 1891 to the creation of the Radical Civic Union, of which he was a founding member and national deputy on various occasions.