War between the Argentine Confederation and the state of Buenos Aires

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War between the Argentine Confederation and the State of Buenos Aires
Part of the Argentine Civil Wars
In dark blue the territory of the State of Buenos Aires. In light blue, the Argentine Confederation.
Date 1852-1862 Location Argentina Result Buenos Aires victory Argentine reunification
Belligerents
Argentina	Buenos Aires
Commanders and leaders
Justo J. de Urquiza	Bartolomé Mitre
Strength
1852:[1] 2,500 regulars 83,000 national guardsmen 1858:[2] 121,500 men	1852:[1] 3,500 regulars 70,000 national guardsmen 1863:[3] 41,514 men

The war between the Argentine Confederation and the state of Buenos Aires was a conflict of the Argentine Civil War. It began with the secession of Buenos Aires from Argentina, and lasted from 1852 to 1862. With the military victory of Buenos Aires at the battle of Pavón, the country was unified again.