The Battle of Jacaré (1823) was a minor engagement during the Brazilian War of Independence, between Portuguese loyalist cavalry under Cunha Fidié and pro–independence rebels from Piauí and Ceará.

In January 1823, towns across the province of Piauí including Piracuruca, Oeiras, and Campo Maior, declared independence from Portuguese rule.

The Portuguese military, led by Major João José da Cunha Fidié, was tasked with suppressing these separatist movements.

On February 28, 1823, during his march from Parnaíba, Fidié's forces encountered a small contingent of 40-50 rebels positioned near the Lagoa do Jacaré.

The rebels aimed to delay Fidié's advance and prevent his forces from regrouping and attacking the more significant resistance movements in Oeiras and Campo Maior.