In March 1865, López asked the Argentine government's permission for an army of 25,000 men (led by General Wenceslao Robles) to travel through the province of Corrientes.
I marts 1865 bad López den argentinske regering om tilladelse for en hær på 25.000 mand (ledet af General Wenceslao Robles) til at bevæge sig gennem Corrientes-provinsen.