During his reign, Claudius revived the rumor that his father Drusus was actually the illegitimate son of Augustus, to give the appearance that Augustus was Claudius' paternal grandfather.
In 9 BC, his father Drusus unexpectedly died on campaign in Germania, possibly from illness.
He was seen as vulnerable throughout his reign, particularly by elements of the nobility.
When he returned to the narrative later in life, Claudius skipped over the wars of the second triumvirate altogether.His maternal grandparents were Mark Antony and Octavia Minor, Augustus' sister, and he was therefore the great-great grandnephew of Gaius Julius Caesar.His paternal grandparents were Livia, Augustus' third wife, and Tiberius Claudius Nero.During his reign the Empire began the conquest of Britain (if the earlier invasions of Britain by Caesar and Caligula's aborted attempts are not counted).
Having a personal interest in law, he presided at public trials, and issued up to twenty edicts a day.Claudius' infirmity probably saved him from the fate of many other nobles during the purges of Tiberius's and Caligula's reigns; potential enemies did not see him as a serious threat.