Question: The Battle of San Roque was part of the Argentine Civil War, the Federalist forces of Córdoba Province governor Juan Bautista Bustos were defeated by which forces of General José María Paz, who were the proponents of the concept of a unitary state (centralized government) in Buenos Aires during the civil wars? 
Sentence (from "Battle of Rincón de Valladares"): It was fought between Federalist forces led by Facundo Quiroga and Unitarian forces under Governor Gregorio Aráoz de Lamadrid, near the city of San Miguel de Tucumán.
Relevant evidence: No