Whether the geese who cackled were authentic or merely ætiological fowls I know not, but it is certain that Rome did not suffer so severely from the Gallic invasion as did her neighbours across the Tiber. Probably it was only the last wave of a great invasion which reached as far as Rome, burnt the Palatine settlement and the humble wattled dwellings of the poor on the Esquiline, and failed to storm the Capitol. At any rate the Gallic invasion of 390 B.C. seems to have started the Romans on their career of conquest, mainly at the expense of the Etruscans. But there were incessant wars with all her neighbours; every summer the army marched out as a matter of course. If it was not a decaying Etruscan town to be taken by siege it was a Latin neighbour, or failing them a Volscian or Sabine community from the hills. Summer, while the corn could be left to do its own growing, was the time for battle. To have been at peace in summer would have been slackness, to wage war in winter a grave solecism. So in short space Rome became an important little town, head of the Latin League and probably the strongest unit in Central Italy. It appears that she began about now to emerge into international notice by the great powers, for we have a treaty of 348 B.C., which may probably be accepted as genuine though the actual date is not so certain, between Rome and Carthage, wherein the Romans, in consideration of promising not to trade in Carthaginian waters, are permitted to do business with the Carthaginian ports in Sicily and acknowledged as suzerains of the Latin League. Thus Rome has apparently by this time some overseas traffic. If no other art, diplomacy seems always to have been at home on Roman soil, and in all her works Rome shows a genius for statecraft. It must have been at some very early date that she discovered her great secret of _divide et impera_. She had already become so far the greatest power in the Latin League, that she had equal rights with all the others combined. The allies, it seems, claimed to supply the general of the allied army on alternate days and to have a half-share of the plunder. Against these very modest demands Rome was firm. She fought the League and beat it in 338; then she divided and ruled the cities. With each she made a separate treaty, granting to each two of the rights of citizenship--the right to trade and the right to marry with her citizens. But she allowed no such rights between the other members of the League, however close neighbours they might be. In this way Rome became the staple market of all Latium; all traffic passed through her hands and her wealth and population increased.