Battle of Acosta Ñu: A Paraguayan battalion made up of children is massacred by the Brazilian Army during the Paraguayan War.

The Battle of Acosta Ñu or Campo Grande (Guarani: Acosta Ñu ñorainõ) was a battle during the Paraguayan War, fought on August 16, 1869, between the Triple Alliance and Paraguay. The 3,500 poorly armed Paraguayans, mostly boys between nine and 15 years old, old men and wounded combatants, confronted 20,000 Brazilian veteran soldiers.: 104