Paraguayan War
Allied counterattack

In subsequent months, the Paraguayans were driven out of the cities of Corrientes and San Cosme, the only Argentine territory still in Paraguayan possession.

By the end of 1865, the Triple Alliance was on the offensive. Its armies numbered 42,000 infantry and 15,000 cavalry as they invaded Paraguay in April. The Paraguayans scored small victories against major forces in the Battle of Corrales (also known as battle of Pehuajó or Itati) in the Corrientes Province, but it could not stop the invasion.
length_constraints:number_paragraphs[5]