Record Data Place Unit Type Nation Containing Unit South America Events Date Type 05/02/1866 At the Battle of Estero Bellaco, Brazilian and Argentine forces beat off a Paraguayan attack. Battles/Soldiers 05/24/1866 At the Battle of Tuyutí, the Paraguayan army suffers massive losses attacking the Allied invaders. Battles/Soldiers 09/22/1866 In the Paraguayan War, an Allied attempt to storm a Paraguayan fortress meets with disaster. Battles/Soldiers People Places Name Type Montevideo, Uruguay City or Town Documents Images Argentina, Chile, and Uruguay, 1857, zoomable map