noun
War of the Triple Alliance; Paraguayan War
Historical term for the 1864–1870 conflict between Paraguay and the Triple Alliance of Argentina, Brazil, and Uruguay.
三国同盟戦争は南米史上最も悲惨な戦争の一つとされる。
The War of the Triple Alliance is considered one of the most tragic wars in South American history.
From 三国同盟 (Triple Alliance) + 戦争 (war), referring to the alliance of Argentina, Brazil, and Uruguay against Paraguay.