Final answer:
Galba was the first emperor during the Year of the Four Emperors, which was a period of civil war and instability following Nero's demise in 68-69 CE. He was assassinated by the Praetorian Guard, leading to the quick succession of emperors until Vespasian restored stability.
Step-by-step explanation:
The student is asking about Galba, the first emperor during the Year of the Four Emperors following the death of Nero. Galba was previously the governor of Hispania before being declared emperor during Julius Vindex's rebellion. Unfortunately, his reign was short-lived as he was assassinated by the Praetorian Guard in 69 A.D.
It's important to understand that the Year of the Four Emperors was a period of civil war and political chaos following Nero's rule. Nero's administration deteriorated after the murder of his mother, Agrippina, and Nero became an oppressive ruler.
His demise led to a quick succession of emperors: Galba, Otho, Vitellius, and finally Vespasian, who established a more stable rule.
By emerging as the final emperor in this turbulent year, Vespasian went on to follow the precedents set forth by Augustus, including public reforms and the famed construction of the Colosseum, ending the confusion and paving the way for his sons to succeed him.