Cassius was a Roman senator and one of the principal organisers of the assassination of Julius Caesar. After the murder he joined Brutus in raising forces in the eastern provinces and died following defeat at Philippi.
After Caesar’s assassination, Cassius and Brutus left Italy and built military power in the eastern provinces, raising troops and money against the Caesarian leaders. Their forces were defeated by Mark Antony and Octavian at Philippi in 42 BCE. Cassius ordered a subordinate to kill him after mistakenly believing that Brutus’s position had collapsed, and his death became part of the republican cause’s final defeat.
Richard Foreman’s Augustus: Son of Caesar begins with Cassius already among the assassins who have fled Rome, leaving the young Octavian to compete for Caesar’s political inheritance. Alex Gough’s Caesar’s Avenger follows Cassius as he and Brutus build military resistance in the east before the Second Triumvirate brings them to Philippi. Peter Tonkin’s Death at Philippi places the hunt for Cassius and Brutus inside the battlefield intelligence war, while Valerio Massimo Manfredi’s The Ides of March concentrates on the conspiracy that makes Cassius one of the principal organisers of Caesar’s murder. Colleen McCullough’s The October Horse spans both halves of the story, from the fears that drive the assassination to the failure of Cassius and Brutus to turn the Ides into a stable republican settlement.