Augustus, 19mm denarius 
TVRPILLIANS III VIR FERON - Radiate crowned and draped bust of Feronia r.
CAESAR AVGVSTVS SIGN RECE - Kneeling Parthian r., holding standard
RIC 288     BMC 4.14     RSC 484     ex. Brad Bowlin

Augustus, 20mm denarius
CAESAR AVGVSTVS - Bare head right
SIGNIS RECEPTIS S P Q R CL V - Shield between legionary standard and legionary eagle
Sear-492     ex. Samus Numismatics

"Augustus received the standards and the prisoners as though he had defeated the Parthians in a campaign; he took great pride in the settlement, and declared that he had won back without striking a blow what had earlier been lost in battle. Indeed, he gave orders that sacrifices should be voted in honour of his success....Besides this he rode into the capital on horseback [an ovatio or minor triumph], and was honoured with a triumphal arch."

Cassius Dio, Roman History (LIV.8)

The drawing above is of a coin not in my collection (sad to say).  It is from Marvin Tameanko's wonderful book Monumental Coins, (an absolute must-have) and is the reverse of a denarius of Augustus showing the now lost Parthian Arch of Augustus in Rome.  Like the coins above and the statue linked to on the story page, it features Parthians begging Augustus to take back the standards.  Augustus played his success for all it was worth.  Considering that this guy founded a system of empire which lasted almost 500 years (1,500 if you count the Byzantines), the fact that Augustus considered it one of his greatest achievements indicates its importance to the Roman world.