Who is Themistocles from Strategy and what is their importance?

Themistocles is a Greek who is noted for having provided the Greek city-states with an advantage over their Persian adversaries by supplying the Persian leader Xerxes with false information. In other words, he passed on a lie, the belief in which greatly helped his own people, the various Greeks, to victory by giving the false impression that Greece was weak and disloyal enough to be ripe for treachery that would serve the Persians.