Despite their frequent internecine wars, the Latin city-states maintained close culturo-religious relations throughout their history. Their most important common tribal event was the four-day Latiar or Feriae Latinae (Latin Festival), held each winter on the sacred mons Albanus (Monte Cavo, Alban Hills, SE of Rome), an extinct volcano. The climax of the festival was a number of sacrifices to Jupiter Latiaris (Jupiter of Latium); the sacrificed meat was shared by the representatives of the Latin communities. These elaborate rituals, as did all Roman religious ceremonies, had to be performed with absolute precision and, if any procedural mistakes were made, had to be repeated from the start. The Latin Festival continued to be held long after all Latium Vetus was integrated into the Roman Republic after 338 BC (from then on, the Roman consuls presided over them) and into the Roman imperial era. The historian Livy, writing around AD 20, ascribed Rome's disastrous defeat by the Carthaginian general Hannibal at the Battle of Lake Trasimene in 217 BC to the impiety of the consul Gaius Flaminius, who, in his eagerness to join his army at its assembly-point of Arretium, omitted to attend the Latin Festival.