For 10 points, name this man who sparked the War of the Triple Alliance while ruling Paraguay in the 1860s.
This ruler overran Mato Grosso during his successful first war, after his father had allied with Mariano Roque Alonso to seize power. His demand for his army to have access to Corrientes province led to another conflict, in which his country lost the Humaitá fortress and the Battle of Tuyutí. Following this man's rule, his country de facto legalized polygamy because there were so few males left, nearly all of them having been killed by Brazil, Argentina, or Uruguay. For 10 points, name this man who sparked the War of the Triple Alliance while ruling Paraguay in the 1860s.
This ruler overran Mato Grosso during his successful first war, after his father had allied with Mariano Roque Alonso to seize power.
Francisco Solano {López}