On 16 July 390 BC, a Gallic army less than the management of tribal chieftain Brennus, achieved the Romans on the financial institutions of the Allia River ten miles north of Rome. The metropolis of Rome grew from settlements close to a ford on the river Tiber, a crossroads of targeted visitors and trade. This prompted a issue, in that Rome arrived to have a huge male population but was bereft of women of all ages.