The War of Paraguay began in December 1864, and it is considered the largest conflict ever to occur in South America to this day. At the time the war started, the Count d’Eu was in Europe and openly expressed his desire to participate in the conflict to Emperor Dom Pedro II. It was expected that upon his return to Brazil, he would immediately head to the front lines, as the emperor himself had appointed him as a general of the Brazilian army.

Discover the reason why Count d'Eu became the commander-in-chief in the War of Paraguay