Julius Caesar's War Commentaries · the Alexandrian Wars

Ulia being relieved, Caesar, to draw Pompey from the siege, marched toward Corduba; sending the cavalry before, with a select body of heavy-armed foot; who, as soon as they came within sight of the place, got up behind the troopers. By this stratagem they could not possibly be perceived by those of Corduba. Upon their approach to the walls, the enemy sallied in great numbers to attack our cavalry.