Because of his prestige, he was charged to reorganize, in November 1812, the Regiment N° 6 of "Black and Browns Patricians", consisting of 782 African American enlisted men.
A few days later, at the Battle of Salta, on February 20, 1813, Díaz Vélez directed an Argentina cavalry wing and although was badly wounded, the coontation was a new and major victory for the patriot weapons.