Quick questions on Succession and the death of Augustus: HSC Ancient History

Marcus Claudius Marcellus, son of Augustus's sister Octavia. Married Julia in 25 BC. Held the aedileship in 23 BC. Augustus appeared to prepare him for the succession.

Marcus Vipsanius Agrippa, Augustus's closest associate from his earliest days. Admiral at Actium (31 BC), architect of the Pantheon (25 BC), and builder of much of Augustan Rome. Married to Julia after Marcellus's death (in 21 BC).

Tiberius Claudius Nero, Augustus's stepson, son of Livia by her first husband (Tiberius Claudius Nero the Elder). A successful general in Germany and the Balkans. Married Julia after Agrippa's death (an unhappy match). The marriage produced one child, a son who died in infancy.

The youngest son of Agrippa and Julia, born after his father's death in 12 BC. Adopted by Augustus alongside Tiberius in AD 4. The two adoptions, taken together, were a hedge: Tiberius as adult heir, Agrippa Postumus as eventual successor or backup.

Livia Drusilla (later Julia Augusta) was Augustus's second wife from 38 BC. Her two sons by her first husband (Tiberius and Drusus the Elder) became important figures.

Augustus died at Nola in Campania on 19 August AD 14, aged 75. He had been ill for some time. His last words, according to Suetonius (Divus Augustus 99), were a request to those at his deathbed to "applaud, since I have played my part well in the comedy of life" (a quotation from Greek theatre).