The Battle of Campichuelo was an action fought on 19 December 1810 between revolutionary forces led by Manuel Belgrano and royalist troops on the right bank of the Paraná River, part of the Paraguay campaign of the Argentine War of Independence.

The Primera Junta sent an expedition to Paraguay in the belief that a majority of its population supported a rebellion against the rule of colonial Governor Bernardo de Velasco.

The river was 1000 meters wide at the crossing point, and the current would carry them a league and a half downstream, to Campichuelo hill.

The passage started at 11:00 pm on 18 December, when a force of 12 men surprised the enemy, taking two prisoners and some weapons.

The main crossing took place from 3:00 am until 6:00 am on 19 December under the command of Major General Machain, forcing the enemy to abandon their position.