 SPOILER: The strategy used by Dwight to reclaim Old Town by luring  the gangsters into a narrow alleyway is based on the strategy used  by Spartan King Leonidas to trap the Persian army in the Battle of  Thermopylae. The film _300 (2006)_ (qv) was based on a book by  Frank Miller (II) (qv) about this battle. In addition, the line  spoken in Dwights internal monologue, "No escape, no surrender, no  mercy", is spoken by the narrator in "300".