High Quality Content by WIKIPEDIA articles! 300 is a 2007 American fantasy action film based on the 1998 comic series of the same name by Frank Miller. It is a fictionalized retelling of the Battle of Thermopylae. The film was directed by Zack Snyder, while Miller served as executive producer and consultant. It was filmed mostly with a super-imposition chroma key technique, to help replicate the imagery of the original comic book.