Battle of Tuyuti
1866 CE · Tuyuti, Paraguay
The Battle of Tuyuti was fought in 1866 CE in Tuyuti, Paraguay between Triple Alliance of Brazil, Argentina and Uruguay vs Paraguay; decisive Allied victory in the bloodiest battle in South American history.
Battle of Tuyuti: quick facts
- Date
- 1866 CE
- Location
- Tuyuti, Paraguay
- Belligerents
- Triple Alliance of Brazil, Argentina and Uruguay vs Paraguay
- Commanders
- Bartolomé Mitre and Manuel Luís Osório vs Francisco Solano López
- Result
- decisive Allied victory in the bloodiest battle in South American history.
- Era
- 🌎 Latin American Wars
- Quiz difficulty
- hard
What happened at the Battle of Tuyuti?
The Battle of Tuyuti was the largest battle in South American history, with over 60,000 combatants. Paraguayan forces under Marshal Francisco Solano Lopez launched a massive assault against the entrenched Triple Alliance forces of Brazil, Argentina, and Uruguay. The attack was repulsed with devastating casualties, marking a turning point in the bloodiest war in South American history.
Did you know?
The War of the Triple Alliance was proportionally the deadliest conflict in modern history. Paraguay lost an estimated 60-90% of its population, including almost all adult males, reducing the country to near extinction.
Sources and further reading
- Battle of Tuyuti on Wikipedia for the full account, historiography and primary sources.
- How BattleGuess compiles and checks battle facts: see the About page.
Entry last reviewed 26 September 2026.