Who was alerted by geese to find the Gauls scaling the Capitoline?

The correct answer is that Marcus Manlius was the individual who was alerted by geese to the presence of the Gauls scaling the Capitoline. This incident is rooted in Roman history, specifically during the siege of the Capitoline Hill by the Gallic forces led by Brennus around 390 BC. According to tradition, the geese, sacred to the goddess Juno, began to honk loudly and squawk, alerting Manlius and the Roman defenders to the approaching threat. This early warning allowed the Romans to prepare for an attack and ultimately defend their stronghold successfully.

Manlius's connection to this event highlights his role as a leader during a critical moment in Roman history, emphasizing themes of vigilance and the protection of the city. This story has stood the test of time and serves as an example of how animals can play significant roles in human affairs, especially in ancient narratives.