Two weeks earlier, a combined Brazilian, Argentine, and Uruguayan army had crossed into Paraguay, driving the defenders back into set positions. On this day, the Paraguayans mounted a 4,500 men heavy counter-attack, inflicting heavy casualties and captured the Allied artillery before reinforcements arrived. The added Allied troops drove back the attack and the Battle of Estero Bellaco is considered an Allied victory. (By John Osborne)
Source Citation
"Paraguay," The American Cyclopedia and Register of Important Events of the Year 1866 (New York: D. Appleton and Company, 1873), 610.