Brennus though is another story; Bellovesus and his Gauls received no threat from roman; the latins allowed them to settle down and integrate as allies; but it wasn't that simple. Certain tribes were hostile and prone to betray the Romans. When the Romans were in control the Celtic tribes of the north simply lived a happily assimilated life. When Rome was in danger though, the Gauls were more than happy to just watch Rome burn or make it promises and deceive it at the last second. The Insubres and Boii were on and off hostile towards Rome depending on how strong or weak Rome was and who was fighting it at the time. Brennus would arrive 100 years after Bellovesus. Brennus was originally of the Senones tribe of north-central France. His people would invade the Adriatic coast of Marche in central Italy; setting up colonies such as senigallia (Gaul of the senones). From here, the senones would attack the latins. His was a pointless mission; parading across the italian countryside almost as if to show who was more macho, and burnt Rome to the ground. When the Romans asked him what they could do to make him leave without killing or destroying more, he noted that he wanted to be payed in much "gold and women". His wishes were granted, and Rome was spared. This would be the very last error the Gauls would commit; the next time both nations were to meet it would be under Cesar near the Helvetii territory, were would begin one of history's most cruel genocides. Never again would the Gauls penetrate Italy, and between 2 and 3 million Gauls would be massacred by a tactically superior army that functioned on precision and superior militarism; a military machine. Employing testudo formations and such military techniques that would see Rome prevail through history.