LOL - I just stumbled across this tidbit on tvtropes.org - from the article on "Annoying Arrows" (i.e., the tendency for characters in media to get stuck full of arrows and keep on fighting) (yeah, D&D gets namechecked here):
300 in a way both overstated and understated the effectiveness of Persian arrows. The arrows were actually very light, like most weapons used by the Persians, and would bounce off Greek shields and armor instead of sticking into them like in the film. But the Persian army was renowned less for its ground archers and more for its mounted archers, who would ride close to the enemy and harass them with targeted arrow fire, which the Greeks at the time had no defense against. After the war, the Spartans actually invented the "hoplite run," in which a soldier would have to sprint the better part of a mile in their armor to train for running down enemy cavalry.
Seriously, Sparta? When presented with deadly enemy horse archers, your response is "JUST RUN THE HORSES DOWN AND PWN THEM YOU PUSSIES"?