On 1 March 1852, Juan Manuel de Rosas formally resigned from power after his defeat at the Battle of Caseros. His departure ended a long period of centralist rule in Buenos Aires. The resignation opened a new chapter in Argentina’s political reorganization. Provinces began to reassess their alliances following years of tension. Leaders throughout the country debated federal reforms and future governance. Rosas’s fall marked a major turning point in national political history.
