The reconnaissance at Jaguarí directly determined the landing site used by Triple Alliance forces to begin their invasion of Paraguayan territory.
Key Facts
- Date
- March 23, 1866
- Location
- Mouth of Jaguari River, Paraná River
- Brazilian flagship
- Steamer Cisnei
- Paraguayan vessel
- Steamer Gualeguai with towed boat
- Brazilian casualties
- None reported; Tamandaré ran aground
- Paraguayan casualties
- None reported
Location
Cause → Event → Consequence
Brazilian forces undertook a reconnaissance mission along the Paraná River aboard the steamer Cisnei, escorted by the ironclad Tamandaré and gunboats Beberibe and Henrique Martins, to survey the mouth of the Jaguari River ahead of planned Allied operations into Paraguayan territory.
On the morning of March 23, 1866, the Paraguayan steamer Gualeguai and a towed boat encountered the Brazilian flotilla at Jaguarí and opened fire without causing damage. The ironclad Tamandaré ran aground on the island of Itapiru during the engagement, though the confrontation remained inconclusive.
Despite the skirmish, the reconnaissance mission succeeded in identifying the region's strategic value. The gathered intelligence allowed Allied commanders to select the site for the landing of Triple Alliance troops, initiating the ground invasion of Paraguayan territory.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Joaquim Marques Lisboa, Manuel Luís Osório, Bartolomé Mitre, Venancio Flores.
Side B
1 belligerent