By this expedition, the Republic gained great popularity throughout Greece; the Athenians and the Achaian league especially were lavish of thanks, and began from that time to consider the Romans as their protectors against their dangerous neighbours, the kings of Macedonia. As to the Illyrians, the lesson they had received was not sufficient to correct them of their piratical habits. Ten years later another expedition was sent to chastise the Istrians at the head of the Adriatic,[503] and soon afterwards the disobedience of Demetrius to the orders of the Senate brought war again upon Illyria. He was compelled to take refuge with Philip of Macedon, while the young king became the ally or subject of the Republic.[504] In the mean time a new war attracted the attention of the Romans. [Sidenote: Invasion of the Cisalpines (528).] IV. The idea of the Senate was evidently to push its domination towards the north of Italy, and thus to preserve it from the invasion of the Gauls. In 522, at the proposal of the tribune Flaminius, the Senones had been expelled from Picenum, and their lands, declared public domain, were distributed among the plebeians. This measure, a presage to the neighbouring Gaulish tribes of the lot reserved for them, excited among them great uneasiness, and they began to prepare for a formidable invasion. In 528, they called from the other side of the Alps a mass of barbarians of the warlike race of the Gesatæ.[505] The terror at Rome was great. The same interests animated the peoples of Italy, and the fear of a danger equally threatening for all began to inspire them with the same spirit.[506] They rushed to arms; an army of 150,000 infantry and 6,000 cavalry was sent into the field, and the census of men capable of bearing arms amounted to nearly 800,000. The enumeration of the contingents of each country[507] furnishes valuable information on the general population of Italy, which appears, at this period, to have been, without reckoning the slaves, about the same as at the present day, yet with this difference, that the men capable of bearing arms were then in a much greater proportion.[508] These documents also give rise to the remark that the Samnites, only forty years recovered from the disasters of their sanguinary struggles, could still furnish 77,000 men.