This leader's general Trebonius led a siege against the city of Massilia. This leader's plan to besiege   an enemy against the sea was thwarted when two defectors told his enemy about the gaps in his walls,  leading to this leader's retreat from Dyrrhachium. He used a hidden fourth regiment of infantry to   turn the enemy's left flank and win the Battle of Pharsalus, after which this leader fought Ptolemy  the Thirteenth alongside Cleopatra. Name this Roman leader who began a civil war against
This leader's general Trebonius led a siege against the city of Massilia. This leader's plan to besiege   an enemy against the sea was thwarted when two defectors told his enemy about the gaps in his walls,  leading to this leader's retreat from Dyrrhachium. He used a hidden fourth regiment of infantry to   turn the enemy's left flank and win the Battle of Pharsalus, after which this leader fought Ptolemy  the Thirteenth alongside Cleopatra. Name this Roman leader who began a civil war against Pompey  after crossing the Rubicon, and was eventually assassinated by Cassius and Brutus in 44 BCE on the  Ides of March.
This leader's general Trebonius led a siege against the city of Massilia.