Ituzaingo

The country later called Ituzaingó lay west of Buenos Aires, near the River of Las Conchas and the crossing at Puente de Márquez. In the early nineteenth century this crossing became entangled in the struggle between Unitarians and Federalists. Juan Lavalle overthrew Governor Manuel Dorrego in December 1828 and ordered his execution. Estanislao López and Juan Manuel de Rosas subsequently combined against him.

On 26 April 1829 their forces met Lavalle's army at the bridge. Cavalry attacks against his flanks drove his troops back toward Morón, and he then withdrew into Buenos Aires. The district's later name commemorates a different battle: the republican victory over Brazil in 1827, fought in what is now Rio Grande do Sul.

The later city of Buenos Aires lies here.