Passage: In the Roman Republic of the 1st century BC, gladiatorial games were one of the more popular forms of entertainment. In order to supply gladiators for the contests, several training schools, or ludi, were established throughout Italy. In these schools, prisoners of war and condemned criminals—who were considered slaves—were taught the skills required to fight in gladiatorial games. In 73 BC, a group of some 200 gladiators in the Capuan school owned by Lentulus Batiatus plotted an escape. When their plot was betrayed, a force of about 70 men seized kitchen implements ("choppers and spits"), fought their way free from the school, and seized several wagons of gladiatorial weapons and armor.Once free, the escaped gladiators chose leaders from their number, selecting two Gallic slaves—Crixus and Oenomaus—and Spartacus, who was said either to be a Thracian auxiliary from the Roman legions later condemned to slavery, or a captive taken by the legions. There is some question as to Spartacus's nationality. A Thraex was a type of gladiator in Rome, so "Thracian" may simply refer to the style of gladiatorial combat in which he was trained.These escaped slaves were able to defeat a small force of troops sent after them from Capua, and equip themselves with captured military equipment as well as their gladiatorial weapons. Sources are somewhat contradictory on the order of events immediately following the escape, but they generally agree that this band of escaped gladiators plundered the region surrounding Capua, recruited many other slaves into their ranks, and eventually retired to a more defensible position on Mount Vesuvius.

Question: Where was the strategic area they could defend at?
Mount Vesuvius