Warner Bros. is introducing us to the characters of 300: Rise of an Empire one poster at a time, with characters such as Queen Gorgo, Calisto and Artemisia being showcased this week. Today, the studio has released the latest one-sheet featuring Sullivan Stapleton as Themistokles, the general who tries to unite all of the Greek clans together in battle against Xerxes (Rodrigo Santoro). Noam Murro directs this action-packed follow-up to 2007's 300, debuting in theaters March 7, 2014.