Complex sentence: At the same time Hartung's Corps was ordered to restart the fight, driving of the division of Cugia and capturing six guns and many prisoners on the top of the Monte Torre, which he had earlier failed to capture.
Split into simpler sentences: At the same time Hartung's Corps was ordered to restart the fight. They drove off the division of Cugia, capturing six guns and many prisoners on the top of Monte Torre, which they had earlier failed to capture.