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The Paraguayan War was incredibly devastating to its namesake country. Estimates vary as to how many people were killed but 60% of the population seems to be a reasonable figure. The question is how could Paraguay win the war and defeat the Triple Alliance? I think winning the Battle of Riachuelo would go a long way to achieving this as it would allow Paraguay control over the river and allow it to support its invasion of Argentina. However, I know virtually nothing about the war so I could be completely wrong. The second question is what would be the effects of Paraguay winning the war? How and what would it change?