The Pharsalia or On the Civil War (Latin: De Bello Civili) is an epic by the Roman poet Lucan (39-65 CE) recounting the conflict between Julius Caesar and Pompey. It consists of ten books, of which the last appears to be incomplete, breaking off during Caesar's campaign in Egypt.
Lucan strongly favours the republican side and the poem has been seen as a riposte to the Augustan propaganda of Virgil's Aeneid. Lucan's stoicism is reflected in his portrayal of Cato, and in his avoidance of divine intervention as a plot device.
Free online texts
Gutenberg: Pharsalia, Dramatic Episodes of the Civil Wars, edited by Douglas B. Killings (1996). HTML, EPUB, MOBI and TXT formats.
Internet Archive: The Pharsalia, translated by Henry T. Riley (1853). PDF, EPUB, TXT, and MOBI formats.
Medieval and Classical Literature Library: Pharsalia, translated by Edward Ridley (1896). HTML format.
Poetry in Translation: Pharsalia, translated by A.S. Kline (2014). Multiple formats.
University of Adelaide (Internet Archive): The Pharsalia of Lucan, translated by Edward Ridley (1896). Multiple formats.
University of Virginia: Lucan's Pharsalia, translated by Arthur Gorges (1614). HTML format.
Intratext: Bellum Civile. HTML format.
Latin Library: De Bello Civili sive Pharsalia. HTML format.
Wikisource: Pharsalia (Book 1). HTML and other formats.
Librivox: Lucan - public domain audiobook in progress.
University of Virginia: Introduction to Latin Epic - Lucan's Bellum Civile, by Laura Gorney.
The Great Conversation: Further reading at Tom's Learning Notes
Latin Resources: Online materials for learning Latin.
Quintilian: The Institutes - comments on Lucan's prose.
Bloom's Western Canon: The Pharsalia is listed.