 Then in the early 4th century BC, the tyrant Dionysius the Elder was again at war against Carthage and, although losing Gela and Camarina, kept that power from capturing the whole of Sicily.After the end of the conflict Dionysius built a massive fortress on Ortygia and 22 km-long walls around all of Syracuse.Another period of expansion saw the destruction of Naxos, Catania and Lentini; then Syracuse entered again in war against Carthage (397 BC).