The second siege of Callao or Fall of Callao (Spanish: Caída del Callao) was the longest lasting siege that occurred on the Pacific coast during the Spanish American wars of independence. The siege was carried out by the combined Gran Colombian and Peruvian independence forces against the royalist soldiers defending the Real Felipe Fortress in the port of Callao, who refused to surrender, and refused to accept the capitulation of the Battle of Ayacucho.
The siege took place from December 5, 1824 to January 23, 1826, when the royalist stronghold was defeated, ending the Spanish Empire's presence in South America.
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