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How did the 1851 coalition remove Juan Manuel de Rosas from power?

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Political map of Argentina showing provincial boundaries, major cities, and neighboring countries including Chile, Bolivia, Paraguay, Brazil, and Uruguay. The map highlights Argentina's extensive Atlantic coastline, the Andes mountain border with Chile, and includes the disputed Falkland Islands (Islas Malvinas) in the South Atlantic. An inset shows Argentina's location within South America.
History of Argentina

In 1851, Justo José de Urquiza, the governor of the province of Entre Ríos, formed a coalition with Brazil and Uruguay to challenge the dictatorial rule of Juan Manuel de Rosas.12

This alliance successfully forced Rosas’s troops to abandon their long-standing siege of Montevideo, Uruguay. Following this, the coalition forces marched against Rosas and decisively defeated his main army at the Battle of Caseros on February 3, 1852, near Buenos Aires. Abandoned by his political supporters and the majority of his troops, Rosas was forced to flee to England, effectively ending his 17-year dictatorship.21