at Marathon, and agreed that the Athenians had won a great victory. Xerxes' invasion happened to coincide yet again with the celebration of the Carneia. This time, however, the Spartans chose not to hold back their entire army in deference to the festival, but instead sent an advance force of 300 men under Leonidas, who were to be reinforced by a full contingent of Spartan warriors after the festival concluded. It is impossible to know for certain whether this change in policy regarding the Carneia was based in shame about missing Marathon (as Brin suggests) or merely marked a reinterpretation of the military threat posed by the invading Persians. All Herodotus tells us is that the Spartan officials did not think that the engagement at Thermopylae would be decided so quickly and intended the main part of their force to arrive before the fighting broke out. References in other works There are references to the Battle at Thermopylae in several of Frank Miller's other comic books. In Sin City: The Big Fat Kill, Dwight McCarthy considers Leonidas' choice of "where to fight" and manages to loosely recreate the Spartan defense tactics by cornering the enemy gang in a tight alley; they then annihilate them with heavy gunfire and explosives. Also in Hell and Back when Wallace is drugged he sees his friend as Leonidas with a machine gun. In The Dark Knight Returns and The Dark Knight Strikes Again, Miller's "omega" Batman stories, there are references to a character named "Hot Gates" (the literal translation of Thermopylae), an adult film star who first makes a version of Snow White, and then declares herself Dictator of Ohio. In the Emmy Award-winning episode "Jack and the Spartans" of the cartoon Samurai Jack, Jack meets a group of Spartan warriors fighting Aku's minions. This episode was partially inspired by Miller's comics. Film adaptation In 2007, Zack Snyder directed a film adaptation of 300 with Frank Miller serving as executive producer to adapt his work for film. It used greenscreen technology to capture the comic book feel; the film is in fact notable for remaining extremely faithful to its source material as a result. It was released in both conventional cinemas and IMAX in 2007. In 2014, a sequel, 300: Rise of an Empire, was made, which is based on Frank Miller's mini-series Xerxes. Video game adaptation A video game based on the movie