In 1866, Paraguay stood on the defensive as the Triple Alliance prepared to invade. The great battles of that year, bloodbaths like Tuyutí, Boquerón, and Curupayty, accomplished very little in military terms. But the largest and bloodiest battles in South American history etched themselves into national memories, and set the war on the road to Armageddon.
Maps: https://www.unknownsoldierspodcast.com/post/paraguayan-war-part-3-the-funnel-of-death-maps
Audible Recommendation: https://www.audible.com/pd/Six-Days-of-War-Audiobook/B002V0PWJG
Music: "Military" by florews, via Pond5.com: https://www.pond5.com/royalty-free-music/item/111522136-military-epic-patriotic-cinematic