Final answer:
Agrippina the Elder accused a rival of poisoning Germanicus, her husband. She was imprisoned by Tiberius for her accusatory stance and eventually starved herself to death. Later, Caligula's brutal rule contributed to his assassination in 41 CE.
Step-by-step explanation:
Caligula's mother, Agrippina the Elder, accused one of Germanicus' rivals of poisoning him after his death. It was for her outspokenness against Emperor Tiberius, whom she detested, that led Tiberius to imprison her. Eventually, she ended up starving herself to death.
Caligula, who became the Roman Emperor after Tiberius, conducted himself generously at the beginning of his reign, but after an illness in 37 CE, he became notorious for his brutal and eccentric behavior, and this changed the nature of his rule significantly, leading to treason investigations and senatorial humiliations. His relationship with the Senate deteriorated, and ultimately, a conspiracy involving the Praetorian Guard, senators, and courtiers led to his assassination in 41 CE.