Battle of Juncal

8–9 February 1827, Juncal Island, Uruguay River

United Provinces victory; the Brazilian river squadron destroyed

Brazil sent a squadron of schooners and gunboats under Jacinto Roque de Sena Pereira up the Uruguay River to cut the Argentine army off from Buenos Aires. Brown followed it with a squadron of small craft and caught it near Juncal Island. On the second day he attacked and broke it up: Sena Pereira's flagship Oriental and twelve other vessels were taken, three were burned by their crews, and Sena Pereira was captured. It was the greatest Argentine naval victory of the war.

Navy of the United Provinces of the Río de la Plata

15 ships, none lost

Ship	Type	Outcome
Sarandí William Brown	Schooner 7 guns	Survived

Ship

Type

Outcome

Sarandí

William Brown

Schooner

7 guns

Survived

Flotillas and other craft	Number	Lost
Schooners and gunboats Balcarce, Maldonado, Pepa, Guanaco, Unión and Uruguay, and eight one-gun launches.	14	0

Flotillas and other craft

Number

Lost

Schooners and gunboats

Balcarce, Maldonado, Pepa, Guanaco, Unión and Uruguay, and eight one-gun launches.

Imperial Brazilian Navy

1+ ships, 15 lost

Ship	Type	Outcome
Oriental Jacinto Roque de Sena Pereira, captured	Schooner 11 guns	Captured

Ship

Type

Outcome

Oriental

Jacinto Roque de Sena Pereira, captured

Schooner

11 guns

Captured

Flotillas and other craft	Number	Lost
Schooners and gunboats Dona Januária, Bertioga, Brocoió, Paraty, Iguapé and others captured; Liberdade do Sul, Itapoã and 7 de Março burned.	About 16	14

Flotillas and other craft

Number

Lost

Schooners and gunboats

Dona Januária, Bertioga, Brocoió, Paraty, Iguapé and others captured; Liberdade do Sul, Itapoã and 7 de Março burned.

About 16

Map

Brown follows the Brazilian river squadron January – February 1827