Warner Bros. is following up the first TV spot for 300: Rise of an Empire that debuted over the weekend with the third trailer, which features a new version of Black Sabbath's classic song "War Pigs." The song is quite fitting for director Noam Murro's sequel, since the story follows General Themistokles (Sullivan Stapleton) and Queen Gorgo (300's Lena Headey), who attempt to unify all of Greece to prepare for war against the mighty Persian king Xerxes (Rodrigo Santoro) and his new ally Artemisia (Eva Green). Watch as the battle unfolds in the latest footage for this action-packed sequel, in theaters March 7.