After Marathon, probably in 489, Miltiades, the hero of the battle, was seriously wounded in an abortive attempt to capture Paros. Taking advantage of his incapacitation, the powerful Alcmaeonid family arranged for him to be prosecuted. The Athenian aristocracy, and indeed Greek aristocrats in general, were loath to see one person pre-eminent, and such maneuvers were commonplace. Miltiades was given a massive fine for the crime of 'deceiving the Athenian people', but died weeks later as a result of his wound. In the wake of this prosecution, the Athenian people chose to use a new institution of the democracy, which had been part of Cleisthenes's reforms, but remained so far unused. This was 'ostracism'—each Athenian citizen was required to write on a shard of pottery ("ostrakon") the name of a politician that they wished to see exiled for a period of ten years. This may have been triggered by Miltiades's prosecution, and used by the Athenians to try to stop such power-games among the noble families. Certainly, in the years (487 BC) following, the heads of the prominent families, including the Alcmaeonids, were exiled. The career of a politician in Athens thus became fraught with more difficulty, since displeasing the population was likely to result in exile.