The story of the first sack of Rome is steeped in myth and legend, but it most likely began when the young city became embroiled in a conflict with a band of Gallic Celts led by the warlord Brennus. On July 18, 387 B.C., the two sides met in battle along the banks of the River Allia. The Romans had yet to perfect the fighting style that would make their legions famous, and many of their men scattered at the first charge of the wild-haired, bare-chested Gallic army. The rest were butchered, leaving Brennus with a clear road to Rome. His men entered the city a few days later and commenced with an orgy of rape and pillage. Buildings were burned or plundered of all their valuables, and most of the Roman senate was put to the sword at the Forum.