Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

This leader survived a crushing defeat at Dyrrhachium (deer-RAWK-ee-um) to win a civil war. He built two concentric walls to besiege the city of Alesia, and wrote that ""all of Gaul is divided into three parts"" after defeating Vercengetorix (vur-sin-GET-uh-riks) there. This husband of Calpurnia won the battle of Pharsalus and made up the First Triumvirate with Crassus and Pompey. Like his lieutenant Mark Antony, he fell in love with Cleopatra. For 10 points, name this Roman dictator who was killed by Brutus and Cassius on the Ides of March.
History