The decisive engagement in this war was Riachuelo, during which the loser's navy was routed, allowing for the allies to maintain control of the Rio de la Plata.
Battles in this war included invasions of Corrientes and the Campaign of Lomas Valentinas. This conflict was instigated by intervention in an election between the Blancos and Colorados. One side's capital was captured by the duke of Caxias. In the beginning of this war, Francisco Solano López ordered an invasion of Mato Grosso. The decisive engagement in this war was Riachuelo, during which the loser's navy was routed, allowing for the allies to maintain control of the Rio de la Plata. For 10 points, name 1860s war lost by Paraguay to the namesake entity, which consisted of Brazil, Uruguay, and Argentina.
Battles in this war included invasions of Corrientes and the Campaign of Lomas Valentinas.
War of the {Triple Alliance}