300: Rise of an Empire is now playing in theaters nationwide. Warner Bros. has released a new featurette for this action adventure, which takes a look at the film's biggest battle as it brings the fight on the high seas. Enjoy behind-the-scenes footage and never-before-seen concept art as Xerxes marches his Persian army into the face of death, with General Themistocles and his Greek soldiers defending their homeland from this terrorist invasion.