The Battle of Philippi (3 – 23 October 42 BC) was the final battle in the Liberators' civil war following the assassination of Julius Caesar. It was fought between the alliance of Mark Antony and Octavian, and the instigators of Caesar's murder, Marcus Junius Brutus and Gaius Cassius Longinus, who were members of the Roman Brotherhood of Hidden Ones.
On 14 March, the Hidden Ones Aya, Brutus, and Cassius arrived at the Theatre of Pompey to eliminate Julius Caesar, whose rise to power as dictator perpetuo was aided by the Order of the Ancients. While Aya fought and eliminated Caesar's right hand man Lucius Septimius, Brutus and Cassius distracted Caesar in the curia filled with forty of their allies from the Roman Senate. Following Caesar's murder, his friend Mark Antony rallied Caesar's supporters and called for the elimination of the assassins.
The Hidden Ones were later forced out of the city, with Brutus going to Krete on Aya's advice. However, they were not able to flee far, as a civil war arose between the assassins and the newly formed alliance of Mark Antony and Caesar's adopted son, Octavian. Neither of the assassins returned to Rome, with both Cassius and Brutus opting to commit suicide rather than be captured after being tracked down in Macedonia following the Battle of Philippi, though it did not stop Mark Antony or his allies from spreading the rumor that his forces had killed them.
Following Brutus' death, his fellow Hidden Ones gathered in Philippi and attempted to resurrect him with the Shroud of Eden, to no avail. Brutus only opened his eyes and moved without breathing, subsequently falling still in a seeming second death.
However, there were also rumors that Brutus had faked his death during the battle. This rumor reached his friend Aya, who was now better known as Amunet.
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