The Gauls, who had already invaded most of Etruria, reached Clusium and its people turned to Rome for help. However, the Roman embassy provoked a skirmish and, then, the Gauls marched straight for Rome (July 390 BC). After the entire Roman army was defeated at the Allia brook (Battle of the Allia), the defenceless Rome was seized by the invaders. The entire Roman army retreated into the deserted Veii whereas most civilians ended at the Etruscan Caere. Nonetheless, a surrounded Roman garrison continued to resist on the Capitoline Hill. The Gauls dwelt within the city, getting their supplies by destroying all nearby towns for plunder.