Caesar was a master of the art of war. He won many battles while risking little on the battlefield. The legions of Rome were forever stretched thin, and yet Caesar still avoided much head-to-head conflict. By using strategies such as sieges, Caesar minimized conflict and lose of Rome's time and resources. The Roman public appreciated the succinctness of Caesar's wars. Sources: http://www.wellplacedpottery.org/alec/literature/caesar.html
