But was it less a resolution of despair, to sit still and allow things to take their course?
When they recollected how the Romans had been in the habit of behaving in Italy without provocation, what could they expect now that the most considerable men in every Italian town had or were alleged to have had--the consequences on either supposition being pretty much the same--an understanding with Drusus, which was immediately directed against the party now victorious and might well be characterized as treason?
All those who had taken part in this secret league, all in fact who might be merely suspected of participation, had no choice left save to begin the war or to bend their neck beneath the axe of the executioner.
Moreover, the present moment presented comparatively favourable prospects for a general insurrection throughout Italy.

We are not exactly informed how far the Romans had carried out the dissolution of the larger Italian confederacies;( 9) but it is not improbable that the Marsians, the Paelignians, and perhaps even the Samnites and Lucanians still were associated in their old communal leagues, though these had lost their political significance and were in some cases probably reduced to mere fellowship of festivals and sacrifices.
The insurrection, if it should now begin, would still find a rallying point in these unions; but who could say how soon the Romans would for that very reason proceed to abolish these also?
The secret league, moreover, which was alleged to be headed by Drusus, had lost in him its actual or expected chief, but it continued to exist and afforded an important nucleus for the political organization of the insurrection; while its military organization might be based on the fact that each allied town possessed its own armament and experienced soldiers.

In Rome on the other hand no serious preparations had been made.

It was reported, indeed, that restless movements were occurring in Italy, and that the communities of the allies maintained a remarkable intercourse with each other; but instead of calling the citizens in all haste to arms, the governing corporation contented itself with exhorting the magistrates in the customary fashion to watchfulness and with sending out spies to learn farther particulars.
The capital was so totally undefended, that a resolute Marsian officer Quintus Pompaedius Silo, one of the most intimate friends of Drusus, is said to have formed the design of stealing into the city at the head of a band of trusty associates carrying swords under their clothes, and of seizing it by a coup de main.

Preparations were accordingly made for a revolt; treaties were concluded, and arming went on silently but actively, till at last, as usual, the insurrection broke out through an accident somewhat earlier than the leading men had intended.
Outbreak of the Insurrection in Asculum Marsians and Sabellians Central and Southern Italy The Roman praetor with proconsular powers, Gaius Servilius, informed by his spies that the town of Asculum (Ascoli) in the Abruzzi was sending hostages to the neighbouring communities, proceeded thither with his legate Fonteius and a small escort, and addressed to the multitude, which was just then assembled in the theatre for the celebration of the great games, a vehement and menacing harangue.
The sight of the axes known only too well, the proclamation of threats that were only too seriously meant, threw the spark into the fuel of bitter hatred that had been accumulating for centuries; the Roman magistrates were torn to pieces by the multitude in the theatre itself, and immediately, as if it were their intention by a fearful outrage to break down every bridge of reconciliation, the gates were closed by command of the magistracy, all the Romans residing in Asculum were put to death, and their property was plundered.