While the slaves lacked military training, Spartacus' forces displayed ingenuity in their use of available local materials, and in their use of clever, unorthodox tactics when facing the disciplined Roman armies. In response to Glaber's siege, Spartacus' men made ropes and ladders from vines and trees growing on the slopes of Vesuvius and used them to rappel down the cliffs on the side of the mountain opposite Glaber's forces. They moved around the base of Vesuvius, outflanked the army, and annihilated Glaber's men.