Passage: 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.A second expedition, under the praetor Publius Varinius, was then dispatched against Spartacus. For some reason, Varinius seems to have split his forces under the command of his subordinates Furius and Cossinius. Plutarch mentions that Furius commanded some 2,000 men, but neither the strength of the remaining forces, nor whether the expedition was composed of militia or legions, appears to be known. These forces were also defeated by the army of escaped slaves: Cossinius was killed, Varinius was nearly captured, and the equipment of the armies was seized by the slaves.With these successes, more and more slaves flocked to the Spartacan forces, as did "many of the herdsmen and shepherds of the region", swelling their ranks to some 70,000. The rebel slaves spent the winter of 73–72 BC training, arming and equipping their new recruits, and expanding their raiding territory to include the towns of Nola, Nuceria, Thurii and Metapontum.The victories of the rebel slaves did not come without a cost. At some time during these events, one of their leaders, Oenomaus, was lost—presumably in battle—and is not mentioned further in the histories.

Question: what did the rebels slaves do in the winter of 73-72 BC?
training, arming and equipping their new recruits