Which ancient Roman marble statue shows Emperor Augustus in military dress addressing his troops?

The ancient Roman statue Augustus of Prima Porta shows Emperor Augustus in military dress addressing his troops.

The marble statue was discovered in 1863 at the Villa of Livia, Augustus’s wife, near Rome. It probably dates from the early first century CE, although it may copy an earlier bronze original. Augustus wears a decorated cuirass and raises his right arm in a gesture of command.

A small Cupid riding a dolphin appears beside his leg, linking Augustus to Venus through his claimed Julian ancestry. The cuirass presents symbolic scenes connected with Roman victories and diplomacy, including the return of military standards from the Parthians.

The statue is often mistaken for a straightforward portrait, but its idealized youthful appearance is deliberate political imagery. The original marble was also brightly painted, as were many ancient sculptures.