It was in the nineteenth year after the sea-fight at Aegospotami, and the sixteenth before the battle at Leuctra; the year in which the Lacedaemonians made what is called the Peace of Antalcidas with the King of Persia; the year in which the elder Dionysius was besieging Rhegium after beating the Italian Greeks on the River Elleporus; and in which the Gauls took Rome itself by storm and were occupying the whole of it except the Capitol. With these Gauls the Romans made a treaty and settlement which they were content to accept: and having thus become beyond all expectation once more masters of their own country, they made a start in their career of expansion; and in the succeeding period engaged in various wars with their neighbours. First, by dint of valour, and the good fortune which attended them in the field, they mastered all the Latini; then they went to war with the Etruscans; then with the Celts; and next with the Samnites, who lived on the eastern and northern frontiers of Latium. Some time after this the Tarentines insulted the ambassadors of Rome, and, in fear of the consequences, invited and obtained the assistance of Pyrrhus. This happened in the year before the Gauls invaded Greece, some of whom perished near Delphi, while others crossed into Asia. Then it was that the Romans—having reduced the Etruscans and Samnites to obedience, and conquered the Italian Celts in many battles—attempted for the first time the reduction of the rest of Italy. The nations for whose possessions they were about to fight they affected to regard, not in the light of foreigners, but as already for the most part belonging and pertaining to themselves. The experience gained from their contests with the Samnites and the Celts had served as a genuine training in the art of war. Accordingly, they entered upon the war with spirit, drove Pyrrhus from Italy, and then undertook to fight with and subdue those who had taken part with him. They succeeded everywhere to a marvel, and reduced to obedience all the tribes inhabiting Italy except the Celts; after which they undertook to besiege some of their own citizens, who at that time were occupying Rhegium.