It was the first major battle Hostile_encounter that saw Unitarians and Federals as two constituted sides .

Supreme Director José Rondeau called Request back the Armies that were fighting Hostile_encounter the Argentine War of Independence to fight the Federals .

On August 16 , Union assaults near the mill were initially successful , but Confederate counterattacks drove Motion the Federals back .

After days of indecisive skirmishing , the Federals returned Arriving to the south side of the James on the night of August 20 .