 After another night march , on 5 March the Allies reached a hill to the south east of Barrosa , the Cerro del Puerco ( also referred to as the Barrosa Ridge ) . Scouts reported the presence of Villatte 's force , and la Peña ordered his vanguard division to advance . With the aid of a fresh sortie of Zayas 's troops from Cádiz , and reinforced by a brigade of the Prince of Anglona 's division , the Spanish drove Villatte 's force across the Almanza Creek . La Peña refused his vanguard permission to pursue the retreating French , who were consequently able to regroup on the far side of the creek . Graham 's Anglo @-@ Portuguese division had remained behind on the Cerro del Puerco to defend the rear and right flank of la Peña 's main force . 
