The Attack on the Brazilian Fort in Punta del Este was a short-lived military operation during the Cisplatine War, led by Brigadier General Juan Antonio Lavalleja.

[3][4] By early 1827, the Brazilian military had established an outpost in Punta del Este, a small, rocky peninsula in southern Uruguay surrounded by sand dunes.

This fort, located near the intersection of Gorlero Avenue and 27th Street, posed a threat to the nearby cities of Maldonado and San Carlos, which were under the control of the United Provinces.

Troops from the garrison were frequently involved in raids and pillaging until Colonel Leonardo Olivera returned with the National Guard from the battlefield of Ituzaingó and besieged the fortification.

Alegre, a prominent officer who had served under General José de San Martín and participated in the Battle of Ituzaingó, was ambushed and killed on the streets of the nearby city of Maldonado by Brazilian troops presumably from the garrison.

[5] Lavalleja was advised against pursuing this operation by Colonel José Brito del Pino, who opposed the idea stating that such trivial issue was beneath the rank of a general-in-chief of the army.

A fierce firefight ensued, with the Brazilians employing grapeshot and cannon fire from both the peninsula and another position located on Gorriti Island.

Colonel Severino, the Brazilian commander, was taken prisoner a few days later on his way to Montevideo when the ship carrying him was intercepted by corsairs responding to the United Provinces government.